3-deoxyglucosone and skin

ABSTRACT

The invention relates to a method of removing 3-deoxyglucosone and other alpha-dicarbonyl sugars from skin. The invention further relates to methods of inhibiting production and function of 3-deoxyglucosone and other alpha-dicarbonyl sugars in skin. The invention also relates to methods of treating 3-deoxyglucosone and other alpha-dicarbonyl sugars associated diseases and disorders of skin.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.10/198,706, filed Jul. 18, 2002, which is entitled to priority under 35U.S.C. §119(e), to U.S. Provisional Application No. 60/392,530, filed onJun. 27, 2002, and U.S. Provisional Application No. 60/373,103, filed onApr. 17, 2002, each of which application is hereby incorporated hereinby reference in its entirety.

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT

This invention was supported in part using funds from the U.S.Government (NIH Grant No. R21 DK55079) and the U.S. Government maytherefore have certain rights in the invention.

BACKGROUND OF THE INVENTION

3-Deoxyglucosone is a Potent Protein Glycating Agent Associated withProtein Crosslinking

3-deoxyglucosone (3DG) is a 1,2-dicarbonyl-3-deoxysugar which is apotent protein crosslinker, is teratogenic and/or mutagenic, causesapoptosis, mutations, and formation of active oxygen species, and is aprecursor to the formation of Advanced Glycation End product (AGE)modified proteins. As reviewed by Brownlee and shown in FIG. 1, thepreviously generally accepted pathway for formation of 3DG comprises areversible reaction between glucose and the ε-NH₂ groups oflysine-containing proteins, forming a Schiff base (Brownlee et al.,1994, Diabetes 43:836-841). This Schiff base then rearranges to form amore stable ketoamine known as fructoselysine (FL) or the “Amadoriproduct”. The dogma has been that 3DG production resulted exclusivelyfrom subsequent non-enzymatic rearrangement, dehydration, andfragmentation of the fructoselysine containing protein (Brownlee et al.,1994, Diabetes 43:836-841 and Makita et al., 1992, Science 258:651-653)(see FIG. 1). However, more recent work has shown that an enzymaticpathway for the production of 3DG exists as well (see FIGS. 1 and 2 andBrown et al., U.S. Pat. No. 6,004,958).

A metabolic pathway was discovered which produces relatively highconcentrations of 3DG in organs affected by diabetes (Brown et al., U.S.Pat. No. 6,004,958). It was found that a specific kinase convertsfructose-lysine into fructose-lysine-3-phosphate (FL3P) in an ATPdependent reaction, and that FL3P then breaks down to form free lysine,inorganic phosphate, and 3DG (Brown et al., U.S. Pat. No. 6,004,958).Methods have also been described for assessing diabetic risk, based onmeasuring components of the 3DG pathway (WO 99/64561).

U.S. Pat. No. 6,004,958 describes a class of compounds which inhibit theenzymatic conversion of fructose-lysine to FL3P and inhibit formation of3DG. Specific compounds which are representative of the class have alsobeen described (Brown et al., WO 98/33492). For example, it was found inWO 98/33492 that urinary or plasma 3DG can be reduced by meglumine,sorbitollysine, mannitollysine, and galactitollysine. It was also foundin WO 98/33492 that diets high in glycated protein are harmful to thekidney and cause a decrease in birth rate.

It has also been disclosed that the fructoselysine pathway is involvedin kidney carcinogenesis (WO 98/33492) and that diet and 3DG may play arole in carcinogenesis associated with this pathway (WO 00/24405; WO00/62626).

Human skin is a composite material comprising a superficial component,the epidermis, and a deep component, the dermis. The outermost layer ofthe epidermis is the stratum corneum. This layer is the stiffest layerof the skin, as well as the one most affected by the surroundingenvironment. Deep to the stratum corneum is the internal portion of theepidermis. Deep to the epidermis, is the papillary layer of the dermis,which comprises relatively loose connective tissue which defines themicro-relief of the skin. The reticular dermis, deep to the papillarydermis, is dense connective tissue that is spatially organized. Thereticular dermis is also associated with coarse wrinkles. Deep to thedermis is subcutaneous connective tissue and adipose tissue.

The principal functions of the skin include protection, excretion,secretion, absorption, thermoregulation, pigmentogenesis, accumulation,sensory perception, and regulation of immunological processes. Thesefunctions are detrimentally affected by the structural changes in theskin due to aging and various diseases and disorders of the skin. Thephysiological changes associated with normal skin aging and photoaginginclude loss of elasticity, decreased collagen, collagen and elastincrosslinking, wrinkling, dry/rough texture, and mottledhyperpigmentation, for example.

The mechanical properties of the skin, such as elasticity, arecontrolled by the density of the network of collagen and elastic fiberscoursing throughout. Damaged collagen and elastin proteins lose theircontractile properties, resulting in such things as skin wrinkling andskin surface roughness. As skin ages or begins to deteriorate due to adisease or disorder, it acquires sags, stretch marks, bumps, orwrinkles, it roughens, it can become discolored, and it has reducedability to synthesize vitamin D. Aged skin also becomes thinner and hasa flattened dermoepidermal interface because of the alterations ofcollagen, elastin, and glycosaminoglycans.

Experimental and Clinical Evidence of the Role of 3DG in Diabetes andOther Diseases

Past studies have concentrated on the role of 3DG in diabetes. It hasbeen shown that diabetic humans have elevated levels of 3DG and3-deoxyfructose (3DF), 3DG's detoxification product, in plasma (Niwa etal., 1993, Biochem. Biophys. Res. Commun. 196:837-843; Wells-Knecht etal., 1994, Diabetes. 43:1152-1156) and in urine (Wells-Knecht et al.,1994, Diabetes. 43:1152-1156), as compared with non-diabeticindividuals. Furthermore, diabetics with nephropathy were found to haveelevated plasma levels of 3DG compared to non-diabetics (Niwa et al.,1993, Biochem. Biophys. Res. Commun. 196:837-843). A recent studycomparing patients with insulin-dependent diabetes mellitus (IDDM) andnoninsulin-dependent diabetes mellitus (NIDDM) confirmed that 3DG and3DF levels were elevated in blood and urine from both types of patientpopulations (Lal et al., 1995, Arch. Biochem. Biophys. 318:191-199). Ithas even been shown that incubation of glucose and proteins in vitrounder physiological conditions produces 3DG. In turn, it has beendemonstrated that 3DG glycates and crosslinks protein creatingdetectable AGE products (Baynes et al., 1984, Methods Enzymol.106:88-98; Dyer et al., 1991, J. Biol. Chem. 266:11654-11660). Thenormal pathway for reductive detoxification of 3DG (conversion to 3DF)may be impaired in diabetic humans since their ratio of urinary andplasma 3DG to 3DF differs significantly from non-diabetic individuals(Lal et al., 1995, Arch Biochem. Biophys. 318:191-199).

Furthermore, elevated levels of 3DG-modified proteins have been found indiabetic rat kidneys compared to control rat kidneys (Niwa et al., 1997,J. Clin. Invest. 99:1272-1280). It has been demonstrated that 3DG hasthe ability to inactivate enzymes such as glutathione reductase, acentral antioxidant enzyme. It has also been shown that Hemoglobin-AGElevels are elevated in diabetic individuals (Makita et al., 1992,Science 258:651-653) and other AGE proteins have been shown inexperimental models to accumulate with time, increasing from 5-50 foldover periods of 5-20 weeks in the retina, lens and renal cortex ofdiabetic rats (Brownlee et al., 1994, Diabetes 43:836-841). In addition,it has been demonstrated that 3DG is a teratogenic factor in diabeticembryopathy (Eriksson et al., 1998, Diabetes 47:1960-1966).

Nonenzymatic glycation, in which reducing sugars are covalently attachedto free amino groups and ultimately form AGEs, has been found to occurduring normal aging and to occur at an accelerated rate in diabetesmellitus (Bierhaus et al., 1998, Cardiovasc. Res. 37:586-600).Crosslinking of proteins and the subsequent AGE formation areirreversible processes that alter the structural and functionalproperties of proteins, lipid components, and nucleic acids (Bierhaus etal., 1998, Cardiovasc. Res. 37:586-600). These processes have beenpostulated to contribute to the development of a range of diabeticcomplications including nephropathy, retinopathy, and neuropathy (Rahbaret al., 1999, Biochem. Biophys. Res. Commun. 262:651-660).

Recently, it has been demonstrated that inhibition of AGE formationreduced the extent of nephropathy in diabetic rats (Ninomiya et al.,2001, Diabetes 50:178-179). Therefore, substances which inhibit AGEformation and/or oxidative stress appear to limit the progression ofdiabetes and its complications and may offer new tools for therapeuticinterventions in the therapy of diabetes (Bierhaus et al., 1998,Cardiovasc. Res. 37:586-600; Thornalley, 1996, Endocrinol. Metab.3:149-166).

Detoxification of 3DG

3DG can be detoxified in the body by at least two pathways. In onepathway, 3DG is reduced to 3-deoxyfructose (3DF) by aldehyde reductase,and the 3DF is then efficiently excreted in urine (Takahashi et al.,1995, Biochemistry 34:1433). Another detoxification reaction oxidizes3DG to 3-deoxy-2-ketogluconic acid (DGA) by oxoaldehyde dehydrogenase(Fujii et al., 1995, Biochem. Biophys. Res. Comm. 210:852).

Results of studies to date show that the efficiency of at least one ofthese enzymes, aldehyde reductase, is adversely affected in diabetes.When isolated from diabetic rat liver, this enzyme is glycated on lysineat positions 67, 84 and 140 and has a low catalytic efficiency whencompared with the normal, unmodified enzyme (Takahashi et al., 1995,Biochemistry 34:1433). Since diabetic patients have higher ratios ofglycated proteins than normoglycemic individuals they are likely to haveboth higher levels of 3DG and a reduced ability to detoxify thisreactive molecule by reduction to 3DF. It has also been found thatoverexpression of aldehyde reductase protects PC12 cells from thecytotoxic effects of methylglyoxal or 3DG (Suzuki et al., 1998, J.Biochem. 123:353-357).

The mechanism by which aldehyde reductase works has been studied. Thesestudies demonstrated that this important detoxification enzyme isinhibited by aldose reductase inhibitors (ARIs) (Barski et al., 1995,Biochemistry 34:11264). ARIs are currently under clinical investigationfor their potential to reduce diabetic complications. These compounds,as a class, have shown some effect on short term diabetic complications.However, they lack clinical effect on long term diabetic complicationsand they worsen kidney function in rats fed a high protein diet. Thisfinding is consistent with the newly discovered metabolic pathway forlysine recovery. For example, a high protein diet will increase theconsumption of fructose-lysine, which in turn undergoes conversion into3DG by the kidney lysine recovery pathway. The detoxification of theresulting 3DG by reduction to 3DF will be inhibited by ARIs therapy.Inhibiting 3DG detoxification will lead to increased 3DG levels, with aconcomitant increase in kidney damage, as compared to rats not receivingARIs. This is because inhibition of the aldose reductase by the ARIswould reduce availability of aldose reductase for reducing 3DG and 3DF.

Aminoguanidine, an agent which detoxifies 3DG pharmacologically viaformation of rapidly excreted covalent derivatives (Hirsch et al., 1992,Carbohydr. Res. 232:125-130), has been shown to reduce AGE-associatedretinal, neural, arterial, and renal pathologies in animal models(Brownlee et al., 1994, Diabetes 43:836-841; Brownlee et al., 1986,Science 232:1629-1632; Ellis et al., 1991, Metabolism 40:1016-1019;Soulis-Liparota et al., 1991, Diabetes 40:1328-1334; and Edelstein etal., 1992, Diabetologia 35:96-97).

To date, no one has studied or identified 3DG in skin, therefore, therole of 3DG in skin diseases, disorders, or conditions has not beenelucidated. Skin aging, wrinkling, and the like, are the subject of muchresearch and there is a long felt need in the art for the development ofnew methods to treat wrinkling or aging skin, as well as diseased skin.The present invention satisfies this need.

SUMMARY OF THE INVENTION

The present invention, as described in the disclosure provided herein,is based on the discovery that 3DG is present in skin. The invention isfurther based on the discovery of a metabolic pathway in which aspecific kinase present in the skin and elsewhere convertsfructose-lysine into fructose-lysine-3-phosphate (FL3P) in an ATPdependent reaction, and that FL3P then breaks down to form 3DG,inorganic phosphate, and free lysine. The invention therefore includescompositions and methods to inhibit enzymatically induced 3DG synthesisand accumulation in skin, compositions and methods to inhibit 3DGfunction or to remove 3DG from skin, as well as compositions and methodsto increase the rate of detoxification and removal of 3DG from skin,based on the metabolic pathways and compositions and methods describedherein.

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing summary, as well as the following detailed description ofpreferred embodiments of the invention, will be better understood whenread in conjunction with the appended drawings. For the purpose ofillustrating the invention, there are shown in the drawings embodimentswhich are presently preferred. It should be understood, however, thatthe invention is not limited to the precise arrangements andinstrumentalities shown. In the drawings:

FIG. 1 is a schematic diagram depicting the initial step involved in themulti-step reaction leading to crosslinking of proteins.

FIG. 2 is a schematic diagram which illustrates the reactions involvedin the lysine recovery pathway. Fructose-lysine (FL) is phosphorylatedby a fructosamine kinase such as amadorase to form fructoselysine3-phosphate (FL3P). FL3P spontaneously decomposes into lysine, Pi, and3DG (Brown et al., U.S. Pat. No. 6,004,958).

FIG. 3 is a graph representing a urinary profile showing the variationover time of 3DF, 3DG and FL from a single individual fed 2 grams of FLand followed for 24 hours (Brown et al., U.S. Pat. No. 6,004,958).

FIG. 4 is a graph representing 3DF excretion in urine over time fromseven volunteers fed 2 grams of fructoselysine (Brown et al., U.S. Pat.No. 6,004,958).

FIG. 5 graphically compares 3DF and N-acetyl-β-glucosaminidase (NAG)levels in control animals and an experimental group maintained on feedcontaining 0.3% glycated protein (Brown et al., U.S. Pat. No.6,004,958).

FIG. 6 is a graph which demonstrates the linear relationship between 3DFand 3DG levels in urine of rats fed either a control diet or a dietenriched in glycated protein (Brown et al., U.S. Pat. No. 6,004,958).

FIG. 7, comprising FIG. 7A and FIG. 7B, graphically depicts fastinglevels of urinary 3DG in normal subjects and in diabetic patients,plotted against the fasting level of 3DF (Brown et al., U.S. Pat. No.6,004,958).

FIG. 8, comprising FIG. 8A and FIG. 8B, depicts images ofphotomicrographs illustrating the effects of a diet containing highlevels of glycated protein on the kidney. Periodic acid and Schiff (PAS)stained kidney sections were prepared from a rat fed a diet enriched inmildly glycated protein (FIG. 8A) and a rat fed a normal diet (FIG. 8B).In this experiment, non-diabetic rats were fed a diet containing 3%glycated protein for 8 months. This diet substantially elevated levelsof FL and its metabolites (>3-fold in the kidney). FIG. 8A is an imageof a photomicrograph of a glomerulus from a rat fed the glycated dietfor 8 months. The glomerulus shows segmental sclerosis of the glomerulartuft with adhesion of the sclerotic area to Bowman's capsule (lowerleft). There is also tubular metaplasia of the parietal epithelia fromapproximately 9 to 3 o'clock. These sclerotic and metaplastic changesare reminiscent of the pathologies observed in diabetic kidney disease.FIG. 8B is an image from a rat on the control diet for 8 months,comprising a histologically normal glomerulus.

FIG. 9 is a graphic comparison of 3DG and 3DF levels in glomerular andtubular fractions from rat kidneys after FL feeding.

FIG. 10 is an image depicting the nucleic acid sequence (SEQ ID NO:1) ofhuman amadorase (fructosamine-3-kinase), NCBI accession numberNM_(—)022158. The accession number for the human gene on chromosome 17is NT_(—)010663.

FIG. 11 is an image depicting the amino acid sequence (SEQ ID NO:2) ofhuman amadorase (fructosamine-3-kinase), NCBI accession numberNP_(—)071441.

FIG. 12 is an image of a polyacrylamide gel demonstrating the effects of3DG on collagen crosslinking and the inhibition of 3DG inducedcrosslinking by arginine. Collagen type I was treated with 3DG in thepresence or absence of arginine. The samples were subjected to cyanogenbromide (CNBr) digestion, electrophoresed on a 16.5% SDS Tris-tricinegel, and then the gels were processed using silver stain techniques tovisualize the proteins. Lane 1 contains molecular weight markerstandards. Lanes 2 and 5 contain 10 and 20 μl of the collagen mixturefollowing CNBr digestion. Lanes 3 and 6 contain the collagen mixturetreated with 3DG and then digested with CNBr, and loaded at 10 and 20μl, respectively. Lanes 4 and 7 contain the mixture of collagenincubated with 5 mM 3DG and 10 mM arginine and then digested with CNBr,and loaded at 10 and 20 μl, respectively.

FIG. 13 is an image of an agarose gel demonstrating that the mRNA foramadorase/fructosamine kinase is present in human skin. RT-PCR wasutilized and published amadorase sequences were used as the basis forpreparing templates for PCR. Based on the primers used (see Examples)for the PCR reaction, the presence of a 519 bp fragment in the gelindicates the presence of amadorase mRNA. Expression of amadorase, asbased on the presence of amadorase mRNA indicated by a 519 bp fragment,was found in the kidney (lane 1) and in the skin (lane 3). No 519 bpfragments were found in the control lanes, which contained primer but notemplate (lanes 2 and 4). Lane 5 contained DNA molecular weight markers.

FIG. 14 is a graphic illustration of the effects of DYN 12(3-O-methylsorbitollysine) treatment on skin elasticity. Diabetic ornormal rats were treated with DYN 12 (50 mg/kg daily) or saline foreight weeks and then subjected to skin elasticity tests. The four groupsused included diabetic controls (saline injection; solid black bar),diabetics treated with DYN 12 (open bar), normal animal controls (salineinjections; stippled bar), and normal animals treated with DYN 12(cross-hatched bar). Data are expressed in kilopascals (kPA).

DETAILED DESCRIPTION OF THE INVENTION

General Description

The invention relates generally to methods to inhibit the production orfunction of 3DG in skin and to methods to remove 3DG from skin. Excess3DG has been shown to be involved in the pathology of diabetes and otherdiseases, but until the present invention, the presence or absence of3DG in the skin has not been examined. A role for 3DG in normal skinfunction and in skin diseases has also not been examined. It has beendiscovered in the present invention that 3DG is present in human skinand that the gene encoding the enzyme regulating the synthesis of 3DG isexpressed in skin. The present invention further discloses compoundsthat can inhibit 3DG from causing crosslinking and other problemsassociated with wrinkling, aging, diseases, and disorders of the skin.

Definitions

Unless defined otherwise, all technical and scientific terms used hereinhave the same meaning as commonly understood by one of ordinary skill inthe art to which this invention belongs. Although any methods andmaterials similar or equivalent to those described herein can be used inthe practice or testing of the present invention, the preferred methodsand materials are described herein.

As used herein, each of the following terms has the meaning associatedwith it in this section.

The articles “a” and “an” are used herein to refer to one or to morethan one (i.e., to at least one) of the grammatical object of thearticle. By way of example, “an element” means one element or more thanone element.

The term “accumulation of 3DG” or “accumulation of alpha-dicarbonylsugars” as used herein refers to an increase in the levels of 3DG oralpha-dicarbonyl sugars.

“Alpha-dicarbonyl sugars,” as used herein, refers to a family ofcompounds, including 3-Deoxyglucosone, glyoxal, methyl glyoxal andglucosone.

“Alpha-dicarbonyl sugar associated parameter of wrinkling, aging,disease or disorder of the skin,” as used herein, refers to thebiological markers described herein, including 3DG levels, 3DF levels,fructosamine kinase levels, protein crosslinking, and other markers orparameters associated with alpha-dicarbonyl sugar associated wrinkling,aging, diseases or disorders of the skin.

“3-Deoxyglucosone” or “3DG,” as used herein, refers to the1,2-dicarbonyl-3-deoxysugar (also known as 3-deoxyhexylosone) which canbe formed via an enzymatic pathway or can be formed via a nonenzymaticpathway. For purposes of the present description, the term3-deoxyglucosone is an alpha-dicarbonyl sugar which can be formed bypathways including the nonenzymatic pathway described in FIG. 1 and theenzymatic pathway resulting in breakdown of FL3P described in FIG. 2.Another source of 3DG is diet. 3DG is a member of the alpha-dicarbonylsugar family, also known as 2-oxoaldehydes.

A “3DG associated” or “3DG related” disease or disorder as used herein,refers to a disease, condition, or disorder which is caused by orassociated with 3DG, including defects related to enhanced synthesis,production, formation, and accumulation of 3DG, as well as those causedby or associated with decreased levels of degradation, detoxification,binding, and clearance of 3DG.

“A 3DG inhibiting amount” or an “alpha-dicarbonyl inhibiting amount” ofa compound refers to that amount of compound which is sufficient toinhibit the function or process of interest, such as synthesis,formation or function of 3DG or another alpha-dicarbonyl sugar.

“3-O-methyl sorbitollysine (3-O-Me-sorbitollysine),” is an inhibitor offructosamine kinases, as described herein. It is used interchangeablywith the term “DYN 12”.

As used herein, “alleviating a disease or disorder symptom,” meansreducing the severity of the symptom.

The term “AGE-proteins” (Advanced Glycation End product modifiedproteins), as used herein, refers to a product of the reaction betweensugars and proteins (Brownlee, 1992, Diabetes Care, 15: 1835; Niwa etal., 1995, Nephron, 69: 438). It is clear that the reaction, forexample, between protein lysine residues and glucose does not stop withthe formation of fructose-lysine (FL). FL can undergo multipledehydration and rearrangement reactions to produce non-enzymatic 3DG,which reacts again with free amino groups, leading to cross-linking andbrowning of the protein involved. Indeed, there is reasonable evidencethat 3DG, as defined above, is a central intermediate in thismodification reaction.

“Amadorase,” as used herein, refers to a fructosamine kinase responsiblefor the production of 3-DG. More specifically it refers to a proteinwhich can enzymatically convert FL to FL3P, as defined above, whenadditionally supplied with a source of high energy phosphate.

The term “Amadori product,” as used herein, refers to a ketoamine suchas fructoselysine, which is a rearrangement product forming followingglucose interaction with the ε-NH₂ groups of lysine-containing proteins.

As used herein, “amino acids” are represented by the full name thereof,by the three-letter code corresponding thereto, or by the one-lettercode corresponding thereto, as indicated in the following table:

Full Name Three-Letter Code One-Letter Code Aspartic Acid Asp D GlutamicAcid Glu E Lysine Lys K Arginine Arg R Histidine His H Tyrosine Tyr YCysteine Cys C Asparagine Asn N Glutamine Gln Q Serine Ser S ThreonineThr T Glycine Gly G Alanine Ala A Valine Val V Leucine Leu L IsoleucineIle I Methionine Met M Proline Pro P Phenylalanine Phe F Tryptophan TrpW

The term “binding” refers to the adherence of molecules to one another,such as, but not limited to, enzymes to substrates, ligands toreceptors, antibodies to antigens, DNA binding domains of proteins toDNA, and DNA or RNA strands to complementary strands.

“Binding partner,” as used herein, refers to a molecule capable ofbinding to another molecule.

The term “Biological sample,” as used herein, refers to samples obtainedfrom a subject, including skin, hair, tissue, blood, plasma, cells,sweat and urine.

The term “clearance,” as used herein refers to the physiological processof removing a compound or molecule, such as by diffusion, exfoliation,removal via the bloodstream, and excretion in urine or other vehiclessuch as sweat.

A “coding region” of a gene consists of the nucleotide residues of thecoding strand of the gene and the nucleotides of the non-coding strandof the gene which are homologous with or complementary to, respectively,the coding region of an mRNA molecule which is produced by transcriptionof the gene.

“Complementary” as used herein refers to the broad concept of subunitsequence complementarity between two nucleic acids, e.g., two DNAmolecules. When a nucleotide position in both of the molecules isoccupied by nucleotides normally capable of base pairing with eachother, then the nucleic acids are considered to be complementary to eachother at this position. Thus, two nucleic acids are complementary toeach other when a substantial number (at least 50%) of correspondingpositions in each of the molecules are occupied by nucleotides whichnormally base pair with each other (e.g., A:T and G:C nucleotide pairs).Thus, it is known that an adenine residue of a first nucleic acid regionis capable of forming specific hydrogen bonds (“base pairing”) with aresidue of a second nucleic acid region which is antiparallel to thefirst region if the residue is thymine or uracil. Similarly, it is knownthat a cytosine residue of a first nucleic acid strand is capable ofbase pairing with a residue of a second nucleic acid strand which isantiparallel to the first strand if the residue is guanine. A firstregion of a nucleic acid is complementary to a second region of the sameor a different nucleic acid if, when the two regions are arranged in anantiparallel fashion, at least one nucleotide residue of the firstregion is capable of base pairing with a residue of the second region.Preferably, the first region comprises a first portion and the secondregion comprises a second portion, whereby, when the first and secondportions are arranged in an antiparallel fashion, at least about 50%,and preferably at least about 75%, at least about 90%, or at least about95% of the nucleotide residues of the first portion are capable of basepairing with nucleotide residues in the second portion. More preferably,all nucleotide residues of the first portion are capable of base pairingwith nucleotide residues in the second portion.

A “compound,” as used herein, refers to any type of substance or agentthat is commonly considered a drug, or a candidate for use as a drug, aswell as combinations and mixtures of the above, or modified versions orderivatives of the compound.

As used herein, the terms “conservative variation” or “conservativesubstitution” refer to the replacement of an amino acid residue byanother, biologically similar residue. Conservative variations orsubstitutions are not likely to significantly change the shape of thepeptide chain. Examples of conservative variations, or substitutions,include the replacement of one hydrophobic residue such as isoleucine,valine, leucine or alanine for another, or the substitution of onecharged amino acid for another, such as the substitution of arginine forlysine, glutamic for aspartic acid, or glutamine for asparagine, and thelike.

“Detoxification” of 3DG refers to the breakdown or conversion of 3DG toa form which does not allow it to perform its normal function.Detoxification can be brought about or stimulated by any composition ormethod, including “pharmacologic detoxification”, or metabolic pathwaywhich can cause detoxification of 3DG.

“Pharmacologic detoxification of 3DG” or other alpha-dicarbonyl sugarsrefers to a process in which a compound binds with or modifies 3DG,which in turn causes it to be become inactive or to be removed bymetabolic processes such as excretion.

A “disease” is a state of health of an animal wherein the animal cannotmaintain homeostasis, and wherein if the disease is not ameliorated thenthe animal's health continues to deteriorate.

In contrast, a “disorder” in an animal is a state of health in which theanimal is able to maintain homeostasis, but in which the animal's stateof health is less favorable than it would be in the absence of thedisorder. Left untreated, a disorder does not necessarily cause afurther decrease in the animal's state of health.

As used herein, the term “domain” refers to a part of a molecule orstructure that shares common physicochemical features, such as, but notlimited to, hydrophobic, polar, globular and helical domains orproperties such as ligand binding, signal transduction, cell penetrationand the like. Specific examples of binding domains include, but are notlimited to, DNA binding domains and ATP binding domains.

An “effective amount” or “therapeutically effective amount” of acompound is that amount of compound which is sufficient to provide abeneficial effect to the subject to which the compound is administered.

As used herein, the term “effector domain” refers to a domain capable ofdirectly interacting with an effector molecule, chemical, or structurein the cytoplasm which is capable of regulating a biochemical pathway.

“Encoding” refers to the inherent property of specific sequences ofnucleotides in a polynucleotide, such as a gene, a cDNA, or an mRNA, toserve as templates for synthesis of other polymers and macromolecules inbiological processes having either a defined sequence of nucleotides(i.e., rRNA, tRNA and mRNA) or a defined sequence of amino acids and thebiological properties resulting therefrom. Thus, a gene encodes aprotein if transcription and translation of mRNA corresponding to thatgene produces the protein in a cell or other biological system. Both thecoding strand, the nucleotide sequence of which is identical to the mRNAsequence and is usually provided in sequence listings, and thenon-coding strand, used as the template for transcription of a gene orcDNA, can be referred to as encoding the protein or other product ofthat gene or cDNA. Unless otherwise specified, a “nucleotide sequenceencoding an amino acid sequence” includes all nucleotide sequences thatare degenerate versions of each other and that encode the same aminoacid sequence. Nucleotide sequences that encode proteins and RNA mayinclude introns.

The term “floating,” as used herein, refers to bonds of a substituent toa ring structure, such that the substituent can be attached to the ringstructure at any available carbon juncture. A “fixed” bond means that asubstituent is attached at a specific site.

The term “formation of 3DG” refers to 3DG which is not necessarilyformed via a synthetic pathway, but can be formed via a pathway such asspontaneous or induced breakdown of a precursor.

As used herein, the term “fragment,” as applied to a protein or peptide,can ordinarily be at least about 3-15 amino acids in length, at leastabout 15-25 amino acids, at least about 25-50 amino acids in length, atleast about 50-75 amino acids in length, at least about 75-100 aminoacids in length, and greater than 100 amino acids in length.

As used herein, the term “fragment,” as applied to a nucleic acid, canordinarily be at least about 20 nucleotides in length, typically, atleast about 50 nucleotides, more typically, from about 50 to about 100nucleotides, preferably, at least about 100 to about 200 nucleotides,even more preferably, at least about 200 nucleotides to about 300nucleotides, yet even more preferably, at least about 300 to about 350,even more preferably, at least about 350 nucleotides to about 500nucleotides, yet even more preferably, at least about 500 to about 600,even more preferably, at least about 600 nucleotides to about 620nucleotides, yet even more preferably, at least about 620 to about 650,and most preferably, the nucleic acid fragment will be greater thanabout 650 nucleotides in length.

The term “fructose-lysine” (FL) is used herein to signify anyglycated-lysine, whether incorporated in a protein/peptide or releasedfrom a protein/peptide by proteolytic digestion. This term isspecifically not limited to the chemical structure commonly referred toas fructose-lysine, which is reported to form from the reaction ofprotein lysine residues and glucose. As noted above, lysine amino groupscan react with a wide variety of sugars. Indeed, one report indicatesthat glucose is the least reactive sugar out of a group of sixteen (16)different sugars tested (Bunn et al., Science, 213: 222 (1981)). Thus,tagatose-lysine formed from galactose and lysine, analogously to glucoseis included wherever the term fructose-lysine is mentioned in thisdescription, as is the condensation product of all other sugars, whethernaturally-occurring or not. It will be understood from the descriptionherein that the reaction between protein-lysine residues and sugarsinvolves multiple reaction steps. The final steps in this reactionsequence involve the crosslinking of proteins and the production ofmultimeric species, known as AGE-proteins, some of which arefluorescent. Once an AGE protein forms, then proteolytic digestion ofsuch AGE-proteins does not yield lysine covalently linked to a sugarmolecule. Thus, these species are not included within the meaning of“fructose-lysine”, as that term is used herein.

The term “Fructose-lysine-3-phosphate,” as used herein, refers to acompound formed by the enzymatic transfer of a high energy phosphategroup from ATP to FL. The term fructose-lysine-3-phosphate (FL3P), asused herein, is meant to include all phosphorylated fructose-lysinemoieties that can be enzymatically formed whether free or protein-bound.

“Fructose-lysine-3-phosphate kinase” (FL3K), as used herein, refers toone or more proteins, such as amadorase, which can enzymatically convertFL to FL3P, as described herein, when supplied with a source of highenergy phosphate. The term is used interchangeably with “fructose-lysinekinase (FLK)” and with “amadorase”.

The term “FL3P Lysine Recovery Pathway,” as used herein, refers to alysine recovery pathway which exists in human skin and kidney, andpossibly other tissues, and which regenerates unmodified lysine as afree amino acid or as incorporated in a polypeptide chain.

The term “Glycated Diet,” as used herein, refers to any given diet inwhich a percentage of normal protein is replaced with glycated protein.The expressions “glycated diet” and “glycated protein diet” are usedinterchangeably herein.

“Glycated lysine residues,” as used herein, refers to the modifiedlysine residue of a stable adduct produced by the reaction of a reducingsugar and a lysine-containing protein. The majority of protein lysineresidues are located on the surface of proteins as expected for apositively charged amino acid. Thus, lysine residues on proteins, whichcome in contact with serum, or other biological fluids, can freely reactwith sugar molecules in solution. This reaction occurs in multiplestages. The initial stage involves the formation of a Schiff basebetween the lysine free amino group and the sugar keto-group. Thisinitial product then undergoes the Amadori rearrangement, to produce astable ketoamine compound.

This series of reactions can occur with various sugars. When the sugarinvolved is glucose, the initial Schiff base product will involve imineformation between the aldehyde moiety on C-1 of the glucose and thelysine ε-amino group. The Amadori rearrangement will result in formationof lysine coupled to the C-1 carbon of fructose,1-deoxy-1-(ε-aminolysine)-fructose, herein referred to asfructose-lysine or FL. Similar reactions will occur with other aldosesugars, for example galactose and ribose (Dills, 1993, Am. J. Clin.Nutr. 58:S779). For the purpose of the present invention, the earlyproducts of the reaction of any reducing sugar and the ε-amino residueof protein lysine are included within the meaning of glycated-lysineresidue, regardless of the exact structure of the modifying sugarmolecule.

“Homologous” as used herein, refers to the subunit sequence similaritybetween two polymeric molecules, e.g., between two nucleic acidmolecules, e.g., two DNA molecules or two RNA molecules, or between twopolypeptide molecules. When a subunit position in both of the twomolecules is occupied by the same monomeric subunit, e.g., if a positionin each of two DNA molecules is occupied by adenine, then they arehomologous at that position. The homology between two sequences is adirect function of the number of matching or homologous positions, e.g.,if half (e.g., five positions in a polymer ten subunits in length) ofthe positions in two compound sequences are homologous then the twosequences are 50% homologous, if 90% of the positions, e.g., 9 of 10,are matched or homologous, the two sequences share 90% homology. By wayof example, the DNA sequences 3′ATTGCC5′ and 3′TATGGC share 50%homology.

As used herein, “homologous” or homology” are used synonymously with“identity”. The determination of percent identity or homology betweentwo nucleotide or amino acid sequences can be accomplished using amathematical algorithm. For example, a mathematical algorithm useful forcomparing two sequences is the algorithm of Karlin and Altschul (1990,Proc. Natl. Acad. Sci. USA 87:2264-2268), modified as in Karlin andAltschul (1993, Proc. Natl. Acad. Sci. USA 90:5873-5877). This algorithmis incorporated into the NBLAST and XBLAST programs of Altschul, et al.(1990, J. Mol. Biol. 215:403-410), and can be accessed, for example atthe National Center for Biotechnology Information (NCBI) world wide website having the universal resource locator<http://www.ncbi.nlm.nih.gov/BLAST/>. BLAST nucleotide searches can beperformed with the NBLAST program (designated “blastn” at the NCBI website), using the following parameters: gap penalty=5; gap extensionpenalty=2; mismatch penalty=3; match reward=1; expectation value 10.0;and word size=11 to obtain nucleotide sequences homologous to a nucleicacid described herein. BLAST protein searches can be performed with theXBLAST program (designated “blastn” at the NCBI web site) or the NCBI“blastp” program, using the following parameters: expectation value10.0, BLOSUM62 scoring matrix to obtain amino acid sequences homologousto a protein molecule described herein. To obtain gapped alignments forcomparison purposes, Gapped BLAST can be utilized as described inAltschul et al. (1997, Nucleic Acids Res. 25:3389-3402). Alternatively,PSI-Blast or PHI-Blast can be used to perform an iterated search whichdetects distant relationships between molecules (Id.) and relationshipsbetween molecules which share a common pattern. When utilizing BLAST,Gapped BLAST, PSI-Blast, and PHI-Blast programs, the default parametersof the respective programs (e.g.,)(BLAST and NBLAST) can be used. See<http://www.ncbi.nlm.nih.gov>.

The percent identity between two sequences can be determined usingtechniques similar to those described above, with or without allowinggaps. In calculating percent identity, typically exact matches arecounted. The term “induction of 3DG” or “inducing 3DG,” as used herein,refers to methods or means which start or stimulate a pathway or eventleading to the synthesis, production, or formation of 3DG or increase inits levels, or stimulate an increase in function of 3DG. Similarly, thephrase “induction of alpha-dicarbonyl sugars”, refers to induction ofmembers of the alpha-dicarbonyl sugar family, including 3DG, glyoxal,methyl glyoxal, and glucosone.

“Inhibiting 3DG” as described herein, refers to any method or techniquewhich inhibits 3DG synthesis, production, formation, accumulation, orfunction, as well as methods of inhibiting the induction or stimulationof synthesis, formation, accumulation, or function of 3DG. It alsorefers to any metabolic pathway which can regulate 3DG function orinduction. The term also refers to any composition or method forinhibiting 3DG function by detoxifying 3DG or causing the clearance of3DG. Inhibition can be direct or indirect. Induction refers to inductionof synthesis of 3DG or to induction of function. Similarly, the phrase“inhibiting alpha-dicarbonyl sugars”, refers to inhibiting members ofthe alpha-dicarbonyl sugar family, including 3DG, glyoxal, methylglyoxal, and glucosone.

The term “inhibiting accumulation of 3DG,” as used herein, refers to theuse of any composition or method which decreases synthesis, increasesdegradation, or increases clearance, of 3DG such that the result islower levels of 3DG or functional 3DG in the tissue being examined ortreated, compared with the levels in tissue not treated with thecomposition or method. Similarly, the phrase “inhibiting accumulation ofalpha-dicarbonyl sugars”, refers to inhibiting accumulation of membersof the alpha-dicarbonyl sugar family, including 3DG, glyoxal, methylglyoxal, and glucosone.

As used herein, an “instructional material” includes a publication, arecording, a diagram, or any other medium of expression which can beused to communicate the usefulness of the peptide of the invention inthe kit for effecting alleviation of the various diseases or disordersrecited herein. Optionally, or alternately, the instructional materialcan describe one or more methods of alleviating the diseases ordisorders in a cell or a tissue of a mammal. The instructional materialof the kit of the invention can, for example, be affixed to a containerwhich contains the identified compound invention or be shipped togetherwith a container which contains the identified compound. Alternatively,the instructional material can be shipped separately from the containerwith the intention that the instructional material and the compound beused cooperatively by the recipient.

An “isolated nucleic acid” refers to a nucleic acid segment or fragmentwhich has been separated from sequences which flank it in a naturallyoccurring state, e.g., a DNA fragment which has been removed from thesequences which are normally adjacent to the fragment, e.g., thesequences adjacent to the fragment in a genome in which it naturallyoccurs. The term also applies to nucleic acids which have beensubstantially purified from other components which naturally accompanythe nucleic acid, e.g., RNA or DNA or proteins, which naturallyaccompany it in the cell. The term therefore includes, for example, arecombinant DNA which is incorporated into a vector, into anautonomously replicating plasmid or virus, or into the genomic DNA of aprokaryote or eukaryote, or which exists as a separate molecule (e.g, asa cDNA or a genomic or cDNA fragment produced by PCR or restrictionenzyme digestion) independent of other sequences. It also includes arecombinant DNA which is part of a hybrid gene encoding additionalpolypeptide sequence. “Modified” compound, as used herein, refers to amodification or derivation of a compound, which may be a chemicalmodification, such as in chemically altering a compound in order toincrease or change its functional ability or activity.

The term “mutagenicity” refers to the ability of a compound to induce orincrease the frequency of mutation. The term “nucleic acid” typicallyrefers to large polynucleotides.

The term “oligonucleotide” typically refers to short polynucleotides,generally, no greater than about 50 nucleotides. It will be understoodthat when a nucleotide sequence is represented by a DNA sequences (i.e.,A, T, G, C), this also includes an RNA sequence (i.e., A, U, G, C) inwhich “U” replaces “T.”

The term “peptide” typically refers to short polypeptides.

“Permeation enhancement” and “permeation enhancers” as used hereinrelate to the process and added materials which bring about an increasein the permeability of skin to a poorly skin permeatingpharmacologically active agent, i.e., so as to increase the rate atwhich the drug permeates through the skin and enters the bloodstream.“Permeation enhancer” is used interchangeably with “penetrationenhancer”.

As used herein, the term “pharmaceutically-acceptable carrier” means achemical composition with which an appropriate compound or derivativecan be combined and which, following the combination, can be used toadminister the appropriate compound to a subject.

As used herein, the term “physiologically acceptable” ester or saltmeans an ester or salt form of the active ingredient which is compatiblewith any other ingredients of the pharmaceutical composition, which isnot deleterious to the subject to which the composition is to beadministered.

“Polypeptide” refers to a polymer composed of amino acid residues,related naturally occurring structural variants, and syntheticnon-naturally occurring analogs thereof linked via peptide bonds,related naturally occurring structural variants, and syntheticnon-naturally occurring analogs thereof.

A “polynucleotide” means a single strand or parallel and anti-parallelstrands of a nucleic acid. Thus, a polynucleotide may be either asingle-stranded or a double-stranded nucleic acid.

“Primer” refers to a polynucleotide that is capable of specificallyhybridizing to a designated polynucleotide template and providing apoint of initiation for synthesis of a complementary polynucleotide.Such synthesis occurs when the polynucleotide primer is placed underconditions in which synthesis is induced, i.e., in the presence ofnucleotides, a complementary polynucleotide template, and an agent forpolymerization such as DNA polymerase. A primer is typicallysingle-stranded, but may be double-stranded. Primers are typicallydeoxyribonucleic acids, but a wide variety of synthetic and naturallyoccurring primers are useful for many applications. A primer iscomplementary to the template to which it is designed to hybridize toserve as a site for the initiation of synthesis, but need not reflectthe exact sequence of the template. In such a case, specifichybridization of the primer to the template depends on the stringency ofthe hybridization conditions. Primers can be labeled with, e.g.,chromogenic, radioactive, or fluorescent moieties and used as detectablemoieties.

As used herein, the term “promoter/regulatory sequence” means a nucleicacid sequence which is required for expression of a gene productoperably linked to the promoter/regulator sequence. In some instances,this sequence may be the core promoter sequence and in other instances,this sequence may also include an enhancer sequence and other regulatoryelements which are required for expression of the gene product. Thepromoter/regulatory sequence may, for example, be one which expressesthe gene product in a tissue specific manner.

A “constitutive” promoter is a promoter which drives expression of agene to which it is operably linked, in a constant manner in a cell. Byway of example, promoters which drive expression of cellularhousekeeping genes are considered to be constitutive promoters.

An “inducible” promoter is a nucleotide sequence which, when operablylinked with a polynucleotide which encodes or specifies a gene product,causes the gene product to be produced in a living cell substantiallyonly when an inducer which corresponds to the promoter is present in thecell.

A “tissue-specific” promoter is a nucleotide sequence which, whenoperably linked with a polynucleotide which encodes or specifies a geneproduct, causes the gene product to be produced in a living cellsubstantially only if the cell is a cell of the tissue typecorresponding to the promoter.

A “prophylactic” treatment is a treatment administered to a subject whodoes not exhibit signs of a disease or exhibits only early signs of thedisease for the purpose of decreasing the risk of developing pathologyassociated with the disease.

The term “protein” typically refers to large polypeptides.

“Removing 3-deoxyglucosone,” as used herein, refers to any compositionor method, the use of which results in lower levels of 3-deoxyglucosone(3DG) or lower levels of functional 3DG. Lower levels of 3DG couldresult from decreased synthesis or formation, increased degradation,increased clearance, or a combination of the three. Lower levels offunctional 3DG could result from modifying the 3DG molecule such that itcan no longer function in the process of glycation or could result frombinding with another molecule which blocks its ability to function.Lower levels of 3DG can also result from increased clearance andexcretion in urine. The term is also used interchangeably withinhibiting accumulation of 3DG. Similarly, the phrase “removingalpha-dicarbonyl sugars”, refers to removal of members of thealpha-dicarbonyl sugar family, including 3DG, glyoxal, methyl glyoxal,and glucosone.

Also, the terms glycated-lysine residue, glycated protein andglycosylated protein or lysine residue are used interchangeably herein,which is consistent with current usage in scientific journals where suchexpressions are often used interchangeably.

The term “skin,” as used herein, refers to the commonly used definitionof skin, e.g., the epidermis and dermis, and the cells, glands, andconnective tissue which comprise the skin.

The term “standard,” as used herein, refers to something used forcomparison. For example, it can be a known standard agent or compoundwhich is administered and used for comparing results when administeringa test compound, or it can be a standard parameter or function which ismeasured to obtain a control value when measuring an effect of an agentor compound on a parameter or function. Standard can also refer to an“internal standard”, such as an agent or compound which is added atknown amounts to a sample and is useful in determining such things aspurification or recovery rates when a sample is processed or subjectedto purification or extraction procedures before a marker of interest ismeasured. Internal standards are often a purified marker of interestwhich has been labeled, such as with a radioactive isotope, allowing itto be distinguished from an endogenous marker.

A “susceptible test animal,” as used herein, refers to a strain oflaboratory animals which, due to the presence of certain geneticmutations, have a higher propensity toward a property of choice, such asdiabetes, cancer, etc.

“Synthesis of 3DG”, as used herein refers to the formation or productionof 3DG. 3DG can be formed based on an enzyme dependent pathway or anon-enzyme dependent pathway. Similarly, the phrase “synthesis ofalpha-dicarbonyl sugars”, refers to synthesis or spontaneous formationof members of the alpha-dicarbonyl sugar family, including 3DG, glyoxal,methyl glyoxal, and glucosone.

“Synthetic peptides or polypeptides” mean a non-naturally occurringpeptide or polypeptide. Synthetic peptides or polypeptides can besynthesized, for example, using an automated polypeptide synthesizer.Those of skill in the art know of various solid phase peptide synthesismethods.

A “therapeutic” treatment is a treatment administered to a subject whoexhibits signs of pathology, for the purpose of diminishing oreliminating those signs.

By “transdermal” delivery is intended both transdermal (or“percutaneous”) and transmucosal administration, i.e., delivery bypassage of a drug through the skin or mucosal tissue and into thebloodstream. Transdermal also refers to the skin as a portal for theadministration of drugs or compounds by topical application of the drugor compound thereto.

The term “topical application”, as used herein, refers to administrationto a surface, such as the skin. This term is used interchangeably with“cutaneous application”.

The term to “treat,” as used herein, means reducing the frequency withwhich symptoms are experienced by a patient or subject or administeringan agent or compound to reduce the frequency with which symptoms areexperienced.

As used herein, “treating a disease or disorder” means reducing thefrequency with which a symptom of the disease or disorder is experiencedby a patient. Disease and disorder are used interchangeably herein.

As used herein, the term “wild-type” refers to the genotype andphenotype that is characteristic of most of the members of a speciesoccurring naturally and contrasting with the genotype and phenotype of amutant.

Methods of Inhibiting Synthesis, Formation, and Accumulation of 3DG andOther Alpha-dicarbonyl Sugars in Skin

It has been discovered in the present invention that an enzyme which isinvolved in the enzymatic synthetic pathway of 3DG production is presentat high levels in skin (see Example 20). Furthermore, it has also beendiscovered in the present invention that 3DG is present at high levelsin skin (see Example 19). Accordingly, the invention includescompositions and methods which interfere with both enzymatic andnonenzymatic based synthesis or formation of 3DG in skin, and which alsointerfere with the function of 3DG in skin. 3DG is a member of a familyof compounds called alpha-dicarbonyl sugars. Other members of the familyinclude glyoxal, methyl glyoxal, and glucosone. The present inventionalso relates to compositions and methods for inhibiting accumulation of3DG and other alpha-dicarbonyl sugars in skin and for inhibiting 3DGdependent or associated skin wrinkling, skin aging, or other skindiseases or disorders, as well as skin wrinkling, skin aging, or otherskin diseases and disorders associated with other alpha-dicarbonylsugars. The invention also includes inhibiting accumulation of 3DG inskin using compositions and methods for stimulating the pathways, orcomponents of the pathways, leading to 3DG detoxification, degradation,or clearance from the skin.

It should be noted that 3DG is a member of the alpha-dicarbonyl sugarfamily of molecules. It should also be noted that other members of thealpha-dicarbonyl sugar family can perform functions similar to 3DG, asdescribed herein, and that like 3DG functions, the functions of othermembers of the alpha-dicarbonyl sugar family are inhibitable as well.Thus, the invention should be construed to include methods of inhibitingsynthesis, formation, and accumulation of other alpha-dicarbonyl sugarsas well.

Inhibition of 3DG synthesis, formation, and accumulation in skin can bedirect or indirect. For example, direct inhibition of 3DG synthesisrefers to blocking an event that occurs immediately prior to or upstreamin a pathway of 3DG synthesis or formation, such as blocking amadoraseor the conversion of fructose-lysine-3-phosphate (FL3P) to 3DG, lysine,and inorganic phosphate. Indirect inhibition can include blocking orinhibiting upstream precursors, enzymes, or pathways, which lead to thesynthesis of 3DG. Components of an upstream pathway, for example,include the amadorase gene and amadorase mRNA. The invention should notbe construed to include inhibition of only the enzymatic andnonenzymatic pathways described herein, but should be construed toinclude methods of inhibiting other enzymatic and nonenzymatic pathwaysof 3DG synthesis, formation and accumulation in skin as well. Theinvention should also be construed to include the other members of thealpha-dicarbonyl sugar family, including glyoxal, methyl glyoxal, andglucosone where applicable.

Various assays described herein may be used to directly measure 3DGsynthesis or levels of 3DG, or assays may be used which are correlativeof 3DG synthesis or levels, such as measurement of its breakdownproduct, 3DF.

The present invention includes novel methods for the inhibition of 3DGsynthesis in skin. Preferably, the skin is mammalian skin, and morepreferably, the mammal skin is human skin.

In one aspect, the inhibitor inhibits an enzyme involved in thesynthesis of 3DG. In one embodiment the enzyme is a fructosamine kinase.In yet another embodiment the fructosamine kinase is amadorase, asdisclosed in U.S. Pat. No. 6,004,958.

In yet another aspect of the invention the inhibitor inhibits thenonenzymatic synthesis and formation of 3DG in the skin.

In one embodiment of the invention, the inhibitor inhibits theaccumulation of 3DG in the skin. In one aspect, the 3DG is synthesizedor formed in the skin. However, the inhibitor can also inhibitaccumulation of 3DG in the skin, where the source of 3DG is other thanthe skin. In one aspect, the source of the 3DG is dietary, i.e., it isderived from an external source rather than an internal source, and thenaccumulates in the skin. Thus, this aspect of the invention includes theinhibition of 3DG synthesis or formation in the skin and/or inhibitionof accumulation of 3DG in the skin. In the latter case, the source of3DG may be enzymatic synthesis of 3DG directly in the skin, enzymaticsynthesis of 3DG in a tissue other than skin, nonenzymatic synthesis orformation of 3DG in the skin or in a non-skin tissue, or the source ofthe 3DG may be external, such as, for example, dietary. The methods tobe used for inhibiting accumulation of 3DG or other alpha-dicarbonylsugars via any one of these pathways are more fully described elsewhereherein.

Methods of Removing 3DG from Skin

The present invention also relates to compositions and methods forremoving 3DG and other alpha-dicarbonyl sugars from skin and forinhibiting 3DG dependent or associated skin wrinkling, skin aging, orother skin diseases or disorders, as well as skin wrinkling, skin aging,or other skin diseases and disorders associated with otheralpha-dicarbonyl sugars. To this end, the invention includescompositions and methods for inhibiting the production, synthesis,formation, and accumulation of 3DG in skin. The invention also includescompositions and methods for stimulating the pathways, or components ofthe pathways, leading to 3DG detoxification, degradation, or clearancefrom the skin.

Using Antibodies to Inhibit 3DG Synthesis

In one aspect of the invention, the inhibitor of a fructosamine kinaseis an antibody. The antibody can be an antibody that is known in the artor it can be an antibody prepared using known techniques and thepublished sequence of the fructosamine kinase/amadorase (Accession No.NP_(—)071441). The antibody may also be one which is prepared againstany of the precursors of 3DG or against molecules which regulate 3DGsynthesis upstream from fructosamine kinase or the precursors of 3DG.

In one aspect, the antibody is selected from the group consisting of apolyclonal antibody, a monoclonal antibody, a humanized antibody, achimeric antibody, and a synthetic antibody.

The invention includes a method by which an antibody inhibitor can begenerated and used as an inhibitor of 3DG synthesis or function.Antibodies can be prepared against a fructosamine kinase or otherproteins of the enzymatic pathway of 3DG synthesis or against othermolecules which are part of the pathway, including precursors of 3DG.The preparation and use of antibodies to inhibit protein synthesis orfunction or to inhibit other molecules or their synthesis is well knownto those skilled in the art, and is described for example in Harlow etal. (Harlow et al., 1988, Antibodies: A Laboratory Manual, Cold SpringHarbor, N.Y.; Harlow et al., 1999, Using Antibodies: A LaboratoryManual, Cold Spring Harbor Laboratory Press, NY). Antibodies of theinvention can also be used to detect proteins or other molecules whichmay be components of the 3DG pathway.

The generation of polyclonal antibodies is accomplished by inoculatingthe desired animal with the antigen and isolating antibodies whichspecifically bind the antigen therefrom.

Monoclonal antibodies can be used effectively intracellularly to avoiduptake problems by cloning the gene and then transfecting the geneencoding the antibody. Such a nucleic acid encoding the monoclonalantibody gene obtained using the procedures described herein may becloned and sequenced using technology which is available in the art.

Monoclonal antibodies directed against full length or peptide fragmentsof a protein or peptide may be prepared using any well known monoclonalantibody preparation procedure. Quantities of the desired peptide mayalso be synthesized using chemical synthesis technology. Alternatively,DNA encoding the desired peptide may be cloned and expressed from anappropriate promoter sequence in cells suitable for the generation oflarge quantities of peptide. Monoclonal antibodies directed against thepeptide or other molecules are generated from mice immunized with thepeptide using standard procedures as referenced herein. A nucleic acidencoding the monoclonal antibody obtained using the procedures describedherein may be cloned and sequenced using technology which is availablein the art, and is described, for example, in Wright et al. (1992,Critical Rev. Immunol. 12:125-168), and the references cited therein.Further, the antibody of the invention may be “humanized” using theexisting technology described in, for example, Wright et al., id., andin the references cited therein, and in Gu et al. (1997, Thrombosis andHematocyst 77:755-759), and other methods of humanizing antibodieswell-known in the art or to be developed. Techniques are also well knownin the art which allow such an antibody to be modified to remain in thecell. The invention encompasses administering a nucleic acid encodingthe antibody, wherein the molecule further comprises an intracellularretention sequence. Such antibodies, frequently referred to as“intrabodies”, are well known in the art and are described in, forexample, Marasco et al. (U.S. Pat. No. 6,004,490) and Beerli et al.(1996, Breast Cancer Research and Treatment 38:11-17).

To generate a phage antibody library, a cDNA library is first obtainedfrom mRNA which is isolated from cells, e.g., the hybridoma, whichexpress the desired protein to be expressed on the phage surface, e.g.,the desired antibody. cDNA copies of the mRNA are produced using reversetranscriptase. cDNA which specifies immunoglobulin fragments areobtained by PCR and the resulting DNA is cloned into a suitablebacteriophage vector to generate a bacteriophage DNA library comprisingDNA specifying immunoglobulin genes. The procedures for making abacteriophage library comprising heterologous DNA are well known in theart and are described, for example, in Sambrook et al. (1989, MolecularCloning: A Laboratory Manual, Cold Spring Harbor, N.Y.).

Bacteriophage which encode the desired antibody, may be engineered suchthat the protein is displayed on the surface thereof in such a mannerthat it is available for binding to its corresponding binding protein,e.g., the antigen against which the antibody is directed. Thus, whenbacteriophage which express a specific antibody are incubated in thepresence of a cell which expresses the corresponding antigen, thebacteriophage will bind to the cell. Bacteriophage which do not expressthe antibody will not bind to the cell. Such panning techniques are wellknown in the art and are described for example, in Wright et al.,(supra).

Processes such as those described above, have been developed for theproduction of human antibodies using M13 bacteriophage display (Burtonet al., 1994, Adv. Immunol. 57:191-280). Essentially, a cDNA library isgenerated from mRNA obtained from a population of antibody-producingcells. The mRNA encodes rearranged immunoglobulin genes and thus, thecDNA encodes the same. Amplified cDNA is cloned into M13 expressionvectors creating a library of phage which express human Fab fragments ontheir surface. Phage which display the antibody of interest are selectedby antigen binding and are propagated in bacteria to produce solublehuman Fab immunoglobulin. Thus, in contrast to conventional monoclonalantibody synthesis, this procedure immortalizes DNA encoding humanimmunoglobulin rather than cells which express human immunoglobulin.

The procedures just presented describe the generation of phage whichencode the Fab portion of an antibody molecule. However, the inventionshould not be construed to be limited solely to the generation of phageencoding Fab antibodies. Rather, phage which encode single chainantibodies (scFv/phage antibody libraries) are also included in theinvention. Fab molecules comprise the entire Ig light chain, that is,they comprise both the variable and constant region of the light chain,but include only the variable region and first constant region domain(CH1) of the heavy chain. Single chain antibody molecules comprise asingle chain of protein comprising the Ig Fv fragment. An Ig Fv fragmentincludes only the variable regions of the heavy and light chains of theantibody, having no constant region contained therein. Phage librariescomprising scFv DNA may be generated following the procedures describedin Marks et al. (1991, J. Mol. Biol. 222:581-597). Panning of phage sogenerated for the isolation of a desired antibody is conducted in amanner similar to that described for phage libraries comprising Fab DNA.

The invention should also be construed to include synthetic phagedisplay libraries in which the heavy and light chain variable regionsmay be synthesized such that they include nearly all possiblespecificities (Barbas, 1995, Nature Medicine 1:837-839; de Kruif et al.1995, J. Mol. Biol. 248:97-105).

By the term “synthetic antibody” as used herein, is meant an antibodywhich is generated using recombinant DNA technology, such as, forexample, an antibody expressed by a bacteriophage as described herein.The term should also be construed to mean an antibody which has beengenerated by the synthesis of a DNA molecule encoding the antibody andwhich DNA molecule expresses an antibody protein, or an amino acidsequence specifying the antibody, wherein the DNA or amino acid sequencehas been obtained using synthetic DNA or amino acid sequence technologywhich is available and well known in the art.

In one embodiment, the antibodies are made against amadorase (SEQ IDNO:2), or against derivatives or fragments thereof. In anotherembodiment, the antibody is made against 3DG. In another aspect of theinvention, antibodies can be made against other components of the 3DGpathway. Such an antibody may be prepared to bind and inhibit functionof its cognate antigen. In another embodiment, the antibodies will bemade against the other members of the alpha-dicarbonyl sugar family ofmolecules.

Inhibiting 3DG Synthesis, Production, Accumulation and Function byInhibiting Fructosamine Kinase Function Using Antisense Techniques

In one embodiment, antisense nucleic acids complementary to fructosaminekinase mRNA can be used to block the expression or translation of thecorresponding mRNA (see SEQ ID NO:1) (see Examples 20 and 22). Antisenseoligonucleotides as well as expression vectors comprising antisensenucleic acids complementary to nucleic acids encoding a fructosaminekinase such as amadorase can be prepared and used based on techniquesroutinely performed by those of skill in the art, and described, forexample, in Sambrook et al. (1989, Molecular Cloning: A LaboratoryManual, Cold Spring Harbor Laboratory, New York), in Ausubel et al.(1997, Current Protocols in Molecular Biology, John Wiley & Sons, NewYork), and in Gerhardt et al. (eds., 1994, Methods for General andMolecular Bacteriology, American Society for Microbiology, Washington,D.C.). The antisense oligonucleotides of the invention include, but arenot limited to, phosphorothioate oligonucleotides and othermodifications of oligonucleotides. Methods for synthesizingoligonucleotides, phosphorothioate oligonucleotides, and otherwisemodified oligonucleotides are well known in the art (U.S. Pat. No.5,034,506; Nielsen et al., 1991, Science 254: 1497). Oligonucleotideswhich contain at least one phosphorothioate modification are known toconfer upon the oligonucleotide enhanced resistance to nucleases.Specific examples of modified oligonucleotides include those whichcontain phosphorothioate, phosphotriester, methyl phosphonate, shortchain alkyl or cycloalkyl intersugar linkages, or short chainheteroatomic or heterocyclic intersugar (“backbone”) linkages. Inaddition, oligonucleotides having morpholino backbone structures (U.S.Pat. No. 5,034,506) or polyamide backbone structures (Nielsen et al.,1991, Science 254: 1497) may also be used.

The examples of oligonucleotide modifications described herein are notexhaustive and it is understood that the invention includes additionalmodifications of the antisense oligonucleotides of the invention whichmodifications serve to enhance the therapeutic properties of theantisense oligonucleotide without appreciable alteration of the basicsequence of the antisense oligonucleotide.

Phosphorothioate oligonucleotides, which have very low sensitivity tonuclease degradation, may be used. Some oligonucleotides may be preparedlacking CG motifs, which should help reduce toxicity for in vivo use.

In another aspect, antisense nucleic acids complementary to fructosaminekinase mRNAs, such as amadorase mRNAs, can be used to block fructosaminekinase function, and subsequently 3DG synthesis and function, byinhibiting translation of a fructosamine kinase mRNA. This can be doneby transfecting an appropriate antisense sequence. Fructosamine kinasegenes have been sequenced and based on these data, antisense nucleicacids may be readily prepared using techniques known to those skilled inthe art.

The antisense oligonucleotide inhibitors of fructosamine kinase may beused independently in the cell culture systems essentially as describedherein (see Examples 20-22) or administered to animals. In oneembodiment of the invention, the inhibitor of fructosamine kinase is anoligonucleotide, preferably from 5 to 25 nucleotides in length. Inanother embodiment, the oligonucleotide is from 25 to 50 nucleotides inlength. In yet another embodiment, the oligonucleotide is from 50 to 100nucleotides in length. In a further embodiment, the oligonucleotide is100-400 nucleotides in length.

Phosphorothioate oligonucleotides enter cells readily without the needfor transfection or electroporation, which avoids subjecting the cellsto nonspecific inducers of a stress response that might confound theexperiment. The oligonucleotides may be administered using severaltechniques known to those of skill in the art and described herein.Effective inhibitory concentrations for phosphorothioates range between1 and 50 μM, so a titration curve for diminution of fructosamine kinasesignal in western blots can be done to establish effectiveconcentrations for each oligonucleotide used. Once inside the cells, thephosphorothioate-oligonucleotides hybridize with the nascent mRNA veryclose to the transcriptional start site, a site having maximum effectfor antisense oligonucleotide inhibition.

The ability to selectively inhibit transcription of fructosamine kinaseor other genes with specific antisense molecules is expected to alsoallow the inhibition of induction of increased fructosamine kinasesynthesis or other proteins involved in the synthesis or induction of3DG in skin diseases or disorders. Thus, the invention provides methodsfor the use of antisense oligonucleotides that will be effective atdiminishing steady-state levels of the protein of interest. Furthermore,inhibition of fructosamine kinase or other important proteins willreduce steady-state synthesis of proteins involved in the synthesis,production, accumulation, or function of 3DG. The invention should beconstrued to include other members of the alpha-dicarbonyl sugar familyof molecules as well, and not just 3DG.

The invention should not be construed to include only fructosaminekinase inhibition using antisense techniques, but should also beconstrued to include inhibition of other genes and their proteins whichare involved in a 3DG synthetic pathway. Furthermore, the inventionshould not be construed to include only these particular antisensemethods described herein.

Using Compounds to Inhibit 3DG Synthesis

In one embodiment the invention includes a method of inhibiting 3DGsynthesis in the skin of a mammal, said method comprising administeringto a mammal an effective amount of an inhibitor of 3DG synthesis, or aderivative or modification thereof, thereby inhibiting 3DG synthesis inthe skin of a mammal. Preferably, the mammal is a human.

In one embodiment, the inhibitor comprises from about 0.0001% to about15% by weight of the pharmaceutical composition. In one aspect, theinhibitor is administered as a controlled-release formulation. Inanother aspect the pharmaceutical composition comprises a lotion, acream, a gel, a liniment, an ointment, a paste, a toothpaste, amouthwash, an oral rinse, a coating, a solution, a powder, and asuspension. In yet another aspect, the composition further comprises amoisturizer, a humectant, a demulcent, oil, water, an emulsifier, athickener, a thinner, a surface active agent, a fragrance, apreservative, an antioxidant, a hydrotropic agent, a chelating agent, avitamin, a mineral, a permeation enhancer, a cosmetic adjuvant, ableaching agent, a depigmentation agent, a foaming agent, a conditioner,a viscosifier, a buffering agent, and a sunscreen.

The invention should be construed to include various methods ofadministration, including topical, oral, intramuscular, and intravenous.

In one aspect of the invention, the inhibitor of 3DG synthesis is aninhibitor of fructosamine kinase/amadorase. The inhibitor offructosamine kinase can be a compound such as those of the formula(Formula XIX):

wherein X is —NR′—, —S(O)—, —S(O)₂—, or —O—, R′ being selected from thegroup consisting of H, and linear or branched chain alkyl group (C₁-C₄)and an unsubstituted or substituted aryl group (C₆-C₁₀) or aralkyl group(C₇-C₁₀) or CH₂(CHOR₂)_(n)CH₂OR₂ with n=1-5 orCH(CH₂OR₂)(CHOR₂)_(n)CH₂OR₂ with n=1-4 where R₂ is H, alkyl (C₁-C₄) oran unsubstituted or substituted aryl group (C₆-C₁₀) or aralkyl group(C₇-C₁₀); R is a substituent selected from the group consisting of H, anamino acid residue, a polyaminoacid residue, a peptide chain, a linearor branched chain aliphatic group (C₁-C₈), which is unsubstituted orsubstituted with at least one nitrogen- or oxygen-containingsubstituent, a linear or branched chain aliphatic group (C₁-C₈), whichis unsubstituted or substituted with at least one nitrogen- oroxygen-containing substituent and interrupted by at least one —O—, —NH—,or —NR₃— moiety, R₃ being linear or branched chain alkyl group (C₁-C₆)and an unsubstituted or substituted aryl group (C₆-C₁₀) or aralkyl group(C₇-C₁₀), with the proviso that when X represents —NR₁—, R and R₁,together with the nitrogen atom to which they are attached, may alsorepresent a substituted or unsubstituted heterocyclic ring having from 5to 7 ring atoms, with at least one of nitrogen and oxygen being the onlyheteroatoms in said ring, said aryl group (C₆-C₁₀) or aralkyl group(C₇-C₁₀) and said heterocyclic ring substituents being selected from thegroup consisting of H, alkyl (C₁-C₆), halogen, CF₃, CN, NO₂ and —O-alkyl(C₁-C₆).

Other appropriate reactants include without limitation unsubstituted orsubstituted aryl (C₆-C₁₀) compounds, wherein the substituent may bealkyl (C₁-C₃), alkoxy, carboxy, nitro or halogen groups, unsubstitutedor substituted alkanes, wherein the substituent may be at least onealkoxy group; or unsubstituted or substituted nitrogen-containingheterocyclic compounds, wherein the substituents may be alkyl (C₁-C₃),aryl (C₆-C₁₀), alkoxy, carboxy, nitro or halogen groups. Illustrativeexamples of the last-mentioned group of reactants include m-methyl-,p-methyl-, m-methoxy-, o-methoxy- and m-nitro-aminobenzenes, o- andp-aminobenzoic acids; n-propylamine, n-butylamine, 3-methoxypropylamine;morpholine and piperidine.

In one aspect of the invention, representative inhibitor compoundshaving the above formula include galactitol lysine, 3-deoxy sorbitollysine, 3-deoxy-3-fluoro-xylitol lysine, and 3-deoxy-3-cyano sorbitollysine and 3-O-methyl sorbitollysine. Examples of known compounds thatmay be used as inhibitors in practicing this invention include, withoutlimitation, meglumine, sorbitol lysine, galactitol lysine, and mannitollysine. A preferred inhibitor is 3-O-methyl sorbitollysine.

The compounds of the invention may be administered to, for example, acell, a tissue, or a subject by any of several methods described hereinand by others which are known to those of skill in the art.

The invention should not be construed to include only the modifications,derivatives, or substitutions of Formula XIX and the representativecompounds described herein. The invention should also be construed toinclude other modifications not described herein, as well as compoundsnot described herein which are representative of Formula XIX.

In one aspect, an inhibitor of the invention which inhibits enzymaticsynthesis of 3DG may be synthesized in vitro using techniques known inthe art (see Example 8).

Compounds and Methods Useful for Inhibiting 3DG Function

The invention, as disclosed herein, relates to the involvement of 3DG incausing various skin diseases and disorders and to methods of inhibitingthe function of 3DG in order to alleviate or treat 3DG associated skindiseases and disorders. The invention also relates to the involvement of3DG in other diseases and disorders, such as gum diseases and disorders.Such gingival diseases and disorders include, but are not limited to,gingivitis, receding gums, and other 3DG or other alpha-dicarbonyl sugarassociated gingival diseases and disorders. As described above,inhibition of 3DG function can be direct or indirect. Therefore, 3DGfunction may be inhibited or caused to decrease using many approaches asdescribed herein. Inhibition of 3DG function may be assayed or monitoredusing techniques described herein as well as others known to those ofskill in the art. Function can be measured directly or it can beestimated using techniques to measure parameters which are known to becorrelative of 3DG function. For example, protein crosslinking andprotein production can be measured directly using techniques such aselectrophoretic analysis (see FIG. 12 and Examples 7 and 18) as well asother techniques (see Examples 21-24). The invention should be construedto include not only compounds useful for preventing 3DG inducedcrosslinking of molecules such as collagen, elastin, and proteoglycans,but it should also be construed to include compounds which inhibitcrosslinking of other molecules as well. The invention should also beconstrued to include the use of compounds to modulate other 3DGfunctions as well, such as apoptosis and formation of reactive oxygenspecies. It is known that in macrophage-derived cells apoptotic celldeath can be induced by methylglyoxal and 3DG (Okado et al., 1996,Biochem. Biophys. Res. Commun. 225:219-224). In yet another aspect ofthe invention, an inhibitor of 3DG inhibits an active oxygen species(Vander Jagt et al., 1997, Biochem. Pharmacol. 53:1133-1140). Theinvention should be construed to include other alpha-dicarbonyl sugarsas well. 3DG and its detoxification product 3DF can be measured severalways using cell, tissue, blood, plasma, and urine samples (see Examples4, 5, 6, 14, 15, and 17) and FL, a product produced during the synthesisof 3DG, can also be measured (see Examples 5), as can a precursor, FL3P(see FIGS. 1 and 2 and Examples 1, 2, and 3).

The invention discloses methods which are useful for inhibiting 3DGfunction in the skin. Such a method includes administering an effectiveamount of one or more inhibitors of 3DG function, or modifications orderivatives thereof, in a pharmaceutical composition to a subject.

In one aspect of the invention the 3DG function inhibitor inhibitsprotein crosslinking. In another aspect, the inhibitor inhibitsformation of advanced glycation end product modified proteins. In yetanother aspect, the 3DG function inhibitor comprises a structure of oneof structural formulas I-XIX or is arginine or a derivative ormodification thereof.

In one embodiment, the inhibitor comprises from about 0.0001% to about15% by weight of the pharmaceutical composition. In one aspect, theinhibitor is administered as a controlled-release formulation. Inanother aspect the pharmaceutical composition comprises a lotion, acream, a gel, a liniment, an ointment, a paste, a toothpaste, amouthwash, an oral rinse, a coating, a solution, a powder, and asuspension. In yet another aspect, the composition further comprises amoisturizer, a humectant, a demulcent, oil, water, an emulsifier, athickener, a thinner, a surface active agent, a fragrance, apreservative, an antioxidant, a hydrotropic agent, a chelating agent, avitamin, a mineral, a permeation enhancer, a cosmetic adjuvant, ableaching agent, a depigmentation agent, a foaming agent, a conditioner,a viscosifier, a buffering agent, and a sunscreen.

The invention should be construed to include various methods ofadministration, including topical, oral, intramuscular, and intravenous.

By way of example, an inhibitor of 3DG function may be an isolatednucleic acid encoding a nucleic acid which is complementary to afructosamine kinase mRNA and in an antisense orientation. Otherinhibitors include an antisense oligonucleotide, an antibody, or othercompounds or agents such as small molecules.

It should be understood that compositions and methods for inhibitingpathways, events, and precursors leading to the synthesis or productionof 3DG, may inhibit not only 3DG synthesis, but also its accumulation,and ultimately its function. The invention should be construed toinclude compositions and methods to inhibit all pathways and precursorsleading to 3DG synthesis (see FIGS. 1 and 2).

In another embodiment of the invention, the disclosure provides methodsfor directly inhibiting function of 3DG which is associated with variousskin diseases and disorders. In one aspect, the method of inhibiting 3DGfunction in skin includes inhibiting 3DG with compounds such as thosecomprising structural formulas I-XVIII described herein. Compoundscomprising these formulas can bind to 3DG and/or inhibits its function,as described herein. In addition, the invention includes other moleculeswhich can bind to and block 3DG function, such as antibodies.

The method of the invention includes use of the following compounds, asillustrated by their structural formulas, to inhibit or block 3DGfunction.

Compounds which may be used in the practice of this invention includeone or more (i.e., combinations) of the following:

Formula I comprises a structure wherein R₁ and R₂ are independentlyhydrogen, lower alkyl, lower alkoxy or an aryl group, or together withthe nitrogen atom form a heterocyclic ring containing from 1 to 2heteroatoms and 2 to 6 carbon atoms, the second of said heteroatomsbeing selected from the group consisting of nitrogen, oxygen and sulfur,and includes their biocompatible and pharmaceutically acceptable acidaddition salts.

The lower alkyl groups in the compounds of Formula (I) contain 1-6carbon atoms and include methyl, ethyl, propyl, butyl, pentyl, hexyl,and the corresponding branched chain isomers thereof. The lower alkoxygroups have 1-6 carbon atoms and include methoxy, ethoxy, propoxy,butoxy, penthyloxy, and hexyloxy and branched chain isomers thereof. Thearyl groups include both substituted and unsubstituted phenyl andpyridyl groups. Typical aryl group substituents are those such as loweralkyl groups, fluoro, chloro, bromo, and iodo atoms.

Of the compounds encompassed by Formula I, certain combinations ofsubstituents are preferred. For instance, when R, is a hydrogen atom,then R₂ is preferably hydrogen or an aryl group.

When R, and R₂ are both alkyl groups, then the compounds havingidentical R, and R₂ alkyl groups are preferable.

When R, and R₂ together with the nitrogen atom form a heterocyclic ringcontaining from 1 to 2 heteroatoms, said heteroatoms being selected fromthe group consisting of nitrogen, oxygen and sulfur, the preferredheterocyclic rings will be morpholino, piperazinyl, piperidinyl andthiomorpholino, with the morpholino being most preferred.

Representative of the compounds of formula (I) are:

-   N,N-dimethylimidodicarbonimidic diamide; imidodicarbonimidic    diamide;-   N-phenylimidodicarbonimidic diamide;-   N-(aminoiminomethyl)-4-morpholinecarboximidamide;-   N-(aminoiminomethyl)-4-thiomorpholinecarboximidamide;-   N-(aminoiminomethyl)-4-methyl-1-piperazinecarboximidamide;-   N-(aminoiminomethyl)-1-piperidinecarboximidamide;-   N-(aminoiminomethyl)-1-pyrrolidinecarboximidamide;-   N-(aminoiminomethyl)-I-hexahydroazepinecarboximidamide;    (aminoiminomethyl)-I-hexahydroazepinecarboximidamide-   N-4-pyridylimidodicarbonimidic diamide;-   N,N-di-n-hexylimidodicarbonimidic diamide;-   N,N-di-n-pentylimidodicarbonimidic diamide;-   N,N-d-n-butylimidodicarbonimidic diamide;-   N,N-dipropylimidodicarbonimidic diamide;-   N,N-diethylimidodicarbonimidic diamide; and the pharmaceutically    acceptable acid addition salts thereof.

Formula II comprises a structure wherein Z is N or CH—; X, Y and Q areeach independently a hydrogen, amino, heterocyclo, amino lower alkyl,lower alkyl or hydroxy group, and R₃ is hydrogen or an amino group,their corresponding 3-oxides, and includes their biocompatible andpharmaceutically acceptable salts.

The compounds of Formula II, wherein the X, Y or Q substituent is on anitrogen of the ring, exist as tautomers, i.e., 2-hydroxypyrimidine canexist also as 2(1H)-pyrimidine. Both forms may be used in practicingthis invention.

The lower alkyl groups of the compounds of formula II contain 1-6 carbonatoms and include methyl, ethyl, propyl, butyl, pentyl, hexyl, and thecorresponding branched chain isomers thereof. The heterocyclic groups ofthe compounds of formula II contain from 3-6 carbon atoms and areexemplified by groups such as pyrrolidinyl, -methylpyrrolidinyl,piperidinol, 2-methylpiperidino morpholino, and hexamethyleneamino.

The “floating” X, Y, Q and NHR₃ bonds in Formula II indicate that thesevariants can be attached to the ring structure at any available carbonjuncture. The hydroxy variant of X, Y and Q can also be present on anitrogen atom.

Of the compounds encompassed by Formula II, certain combinations ofsubstituents are preferred. For instance, compounds having R₃ ashydrogen, as a CH group, and at least one of X, Y or Q as another aminogroup, are preferred. The group of compounds where R₃ is hydrogen, Z isa CH group and one of X or Y is an amino lower alkyl group are alsopreferred. Another preferred group of compounds is those where R ishydrogen and Z is N (nitrogen). Certain substitution patterns arepreferred, i.e., the 6-position (IUPAC numbering, Z. dbd. CH) ispreferably substituted, and most preferably by an amino or a nitrocontaining group. Also preferred are compounds where two or more of X, Yand Q are other than hydrogen.

Representative of the compounds of formula II are:

4,5-diaminopyrimidine; 4-amino-5-aminomethyl-2-methylpyrimidine;6-(piperidino)-2,4-diaminopyrimidine 3-oxide; 4,6-diaminopyrimidine;4,5,6-triaminopyrimidine; 4,5-diamino-6-hydroxy pyrimidine;2,4,5-triamino-6-hydroxypyrimidine; 2,4,6-triaminopyrimidine;4,5-diamino-2-methylpyrimidine; 4,5-diamino-2,6-dimethylpyrimidine;4,5-diamino-2-hydroxy-pyrimidine; and4,5-diamino-2-hydroxy-6-methylpyrimidine.

Formula III comprises a structure wherein R₄ is hydrogen or acyl, R₅ ishydrogen or lower alkyl, Xa is a substituent selected from the groupconsisting of lower alkyl, carboxy, carboxymethyl, or a phenyl orpyridyl group, optionally substituted by halogen, lower alkyl, hydroxylower alkyl, hydroxy, or acetylamino with the proviso that when X is aphenyl or pyridyl group, optionally substituted, then R₅ is hydrogen andincludes their biocompatible and pharmaceutically acceptable acidaddition salts.

The lower alkyl groups in the compounds of Formula III contain 1-6carbon atoms and include methyl, ethyl, propyl, butyl, pentyl, hexyl,and the corresponding branched chain isomers thereof. The halo variantscan be fluoro, chloro, bromo, or iodo substituents.

Equivalent to the compounds of Formula III for the purpose of thisinvention are the biocompatible and pharmaceutically acceptable saltsthereof.

Such salts can be derived from a variety of organic and inorganic acidsincluding but not limited to methanesulfonic, hydrochloric,toluenesulfonic, sulfuric, maleic, acetic and phosphoric acids.

Of the compounds encompassed by Formula III, certain substituents arepreferred. For instance, R₄ is preferably a methyl group and Xa ispreferably a phenyl or substituted phenyl group.

Representative of the compounds of Formula III are:

N-acetyl-2-(phenylmethylene)hydrazinecarboximidamide;2-(phenylmethylene)hydrazinecarboximidamide;2-(2,6-dichlorophenylmethylene)hydrazinecarboximidamide pyridoxalguanylhydrazone; pyridoxal phosphate guanylhydrazone;2-(1-methylethylidene)hydrazinecarboximidamide; pyruvic acidguanylhydrazone; 4-acetamidobenzaldehyde guanylhydrazone;4-acetamidobenzaldehyde N-acetylguanylhydrazone; acetoacetic acidguanylhydrazone; and the biocompatible and pharmaceutically acceptablesalts thereof.

Formula IV comprises a structure wherein R₆ is hydrogen or a lower alkylgroup, or a phenyl group, optionally substituted by 1-3 halo, amino,hydroxy or lower alkyl groups, R₇ is hydrogen, a lower alkyl group, oran amino group and R₈ is hydrogen or a lower alkyl group and includestheir biocompatible and pharmaceutically acceptable acid addition salts.

The lower alkyl groups in the compounds of Formula IV contain 1-6 carbonatoms and include methyl, ethyl, propyl, butyl, pentyl, hexyl, and thecorresponding branched chain isomers thereof. The halo variants can befluoro, chloro, bromo, or iodo substituents. Where the phenyl ring issubstituted, the point or points of substitution may be ortho meta orpara to the point of attachment of the phenyl ring to the straight chainof the molecule.

Representative of the compounds of Formula IV are: equivaln-butanehydrazonic acid hydrazide; 4-methylbenzamidrazone;N-methylbenzenecarboximidic acid hydrazide; benzenecarboximidic acid1-methylhydrazide; 3-chlorobenzamidrazone; 4-chlorobenzamidrazone;2-fluorobenzamidrazone; 3-fluorobenzamidrazone; 4-fluorobenzamidrazone;2-hydroxybenzamidrazone; 3-hydroxybenzamidrazone,4-hydroxybenzamidrazone: 2-aminobenzamidrazone; benzenecarbohydrazonicacid hydrazide; benzenecarbohydrazonic acid 1-methylhydrazide; and thebiocompatible and pharmaceutically acceptable salts thereof.

Formula V comprises a structure wherein R₉ and R₁₀ are independentlyhydrogen, hydroxy, lower alkyl or lower alkoxy, with the proviso thatthe “floating” amino group is adjacent to the fixed amino group, andincludes their biocompatible and pharmaceutically acceptable acidaddition salts.

The lower alkyl groups of the compounds of Formula V contain 1-6 carbonatoms and include methyl, ethyl, propyl, butyl, pentyl, hexyl, and thecorresponding branched chain isomers thereof. Likewise, the lower alkoxygroups of the compounds of formula V contain 1-6 carbon atoms andinclude methoxy, ethoxy, propoxy, butoxy pentoxy, hexoxy, and thecorresponding branched chain isomers thereof.

Equivalent to the compounds of Formula V for the purpose of thisinvention are the biocompatible and pharmaceutically acceptable saltsthereof.

Such salts can be derived from a variety of organic and inorganic acidsincluding but not limited to methanesulfonic, hydrochloric,toluenesulfonic, sulfuric, maleic, acetic and phosphoric acids.

Of the compounds encompassed by Formula V, certain substituents arepreferred. For instance, when R₉ is hydrogen then R₁₀ is preferably alsohydrogen.

Representative of the compounds of Formula V are: 3,4-diaminopyridine;2,3-diaminopyridine; 5-methyl-2,3-diaminopyridine;4-methyl-2,3-diaminopyridine; 6-methyl-2,3-pyridinediamine;4,6-dimethyl-2,3-pyridinediamine; 6-hydroxy-2,3-diaminopyridine;6-ethoxy-2,3-diaminopyridine; 6-dimethylamino-2,3-diaminopyridine;diethyl 2-(2,3-diamino-6-pyridyl)malonate; 6(4-methyl-1-pyperazinyl)-2,3-pyridinediamine; 6-(methylthio)-5(trifluoromethyl)-2,3-pyridinediamine;5-(trifluoromethyl)-2,3-pyridinediamine;6-(2,2,2-trifluoroethoxy)-5-(trifluoromethyl)-2,3-pyridinediamine;6-chloro-5-(trifluoromethyl)-2,3-pyridinediamine;5-methoxy-6-(methylthio)-2,3-pyridinediamine;5-bromo-4-methyl-2,3-pyridinediamine;5-(trifluoromethyl-2,3-pyridinediamine;6-bromo-4-methyl-2,3-pyridinediamine;5-bromo-6-methyl-2,3-pyridinediamine; 6-methoxy-3,4-pyridinediamine;2-methoxy-3,4-pyridinediamine; 5-methyl-3,4-pyridinediamine;5-methoxy-3,4-pyridinediamine; 5-bromo-3,4-pyridinediamine;2,3,4-pyridinetriamine; 2,3,5-pyridinetriamine;4-methyl-2,3,6-pyridinetriamine; 4-(methylthio)-2,3,6-pyridinetriamine;4-ethoxy-2,3,6-pyridinetriamine; 2,3,6-pyridinetriamine;3,4,5-pyridinetriamine; 4-methoxy-2,3-pyridinediamine;5-methoxy-2,3-pyridinediamine; 6-methoxy-2,3-pyridinediamine; and thebiocompatible and pharmaceutically acceptable salts thereof.

Formula VI comprises a structure wherein n is 1 or 2, R₁₁ is an aminogroup or a hydroxyethyl group, and R₁₂ is an amino, a hydroxyalkylamino,a lower alkyl group or a group of the formula alk-Ya wherein alk is alower alkylene group and Ya is selected from the group consisting ofhydroxy, lower alkoxy, lower alkylthio, lower alkylamino andheterocyclic groups containing 4-7 ring members and 1-3 heteroatoms;with the proviso that when R₁₁ is a hydroxyethyl group then R, is anamino group; their biocompatible and pharmaceutically acceptable acidaddition salts.

The lower alkyl, lower alkylene and lower alkoxy groups referred toherein contain 1-6 carbon atoms and include methyl, methylene, methoxy,ethyl, ethylene, ethoxy, propyl, propylene, propoxy, butyl, butylene,butoxy, pentyl, pentylene, pentyloxy, hexyl, hexylene, hexyloxy and thecorresponding branched chain isomers thereof. The heterocyclic groupsreferred to herein include 4-7 member rings having at least one and upto 3 heteroatoms therein.

Representative heterocyclic groups are those such as morpholino,piperidino, piperazino, methylpiperazino, and hexamethyleneimino.

Equivalent to the compounds of Formula VI for the purpose of thisinvention are the biocompatible and pharmaceutically acceptable saltsthereof.

Such salts can be derived from a variety of organic and inorganic acidsincluding but not limited to, methanesulfonic, hydrochloric,toluenesulfonic, sulfuric, maleic, acetic and phosphoric acids.

Of the compounds encompassed by Formula VI, certain combinations ofsubstituents are preferred. For instance, when R₁₁ is a hydroxyethylgroup, then R₁₂ is an amino group. When R₁₁ is an amino group, then R₁₂is preferably a hydroxy lower alkylamino, a lower alkyl group or a groupof the formula alk-Y, wherein alk is a lower alkylene group and Y isselected from the group consisting of hydroxy, lower alkoxy, loweralkylthio, lower alkylamino and heterocyclic groups containing 4-7 ringmembers and 1-3 heteroatoms.

Representative of the compounds of Formula VI are:

-   1-amino-2-[2-(2-hydroxyethyl) hydrazino]-2-imidazoline;    1-amino-[2-(2-hydroxyethyl) hydrazino]-2-imidazoline;    1-amino-2-(2-hydroxyethylamino)-2-imidazoline;    1-(2-hydroxyethyl)-2-hydrazino-1,4,5,6-tetrahydropyrimidine;    1-(2-hydroxyethyl)2-hydrazino-2-imidazoline;    1-amino-2-([2-(4-morpholino)ethyl]amino)imidazoline;    ([2-(4-morpholino)ethyl]amino)imidazoline;    1-amino-2-([3-(4-morpholino)propyl]amino)imidazoline;    1-amino-2-([3-(4-methylpiperazin-1-yl)propyl]-amino)imidazoline;    1-amino-2-([3-(dimethylamino)propyl]amino)imidazoline;    1-amino-2-[(3-ethoxypropyl)amino]imidazoline;    1-amino-2-([3-(1-imidazolyl)propyl]amino)imidazoline;    1-amino-2-(2-methoxyethylamino)-2-imidazoline;    (2-methoxyethylamino)-2-imidazoline;    1-amino-2-(3-isopropoxypropylamino)-2-imidazoline;    1-amino-2-(3-methylthiopropylamino)-2-imidazoline;    1-amino-2[3-(1-piperidino)propylamino)imidazoline;    1-amino-2-[2,2-dimethyl-3-(dimethylamino)propylamino]-2-imidazoline;    1-amino-2-(neopentylamino)-2-imidazoline; and the biocompatible and    pharmaceutically acceptable salts thereof.

Formula VII comprises a structure wherein R₁₃ is a hydrogen or an aminogroup, R₁₄ and R₁₅ are independently an amino group, a hydrazino group,a lower alkyl group, or an aryl group with the proviso that one of R₁₃,R₁₄ and R₁₅ must be an amino or a hydrazino group, and includes theirbiologically or pharmaceutically acceptable acid or alkali additionsalts.

The lower alkyl groups referred to above preferably contain 1-6 carbonatoms and include methyl, ethyl, propyl, butyl, pentyl, hexyl, and thecorresponding branched-chain isomers thereof.

The aryl groups encompassed by the Formula VII are those containing 6-10carbon atoms, such as phenyl and lower alkyl substituted-phenyl, e.g.tolyl and xylyl, and phenyl substituted by 1-2 halo, hydroxy or loweralkoxy groups.

The halo atoms in the Formula VII may be fluoro, chloro, bromo, or iodo.The lower alkoxy groups contain 1-6, and preferably 1-3, carbon atomsand are illustrated by methoxy, ethoxy, n-propoxy, isopropoxy and thelike.

For the purposes of this invention equivalent to the compounds ofFormula VII are the biologically and pharmaceutically acceptable acidaddition salts thereof. Such acid addition salts may be derived from avariety of organic and inorganic acids such as sulfuric, phosphoric,hydrochloric, hydrobromic, sulfamic, citric, lactic, maleic, succinic,tartaric, cinnamic, acetic, benzoic, gluconic, ascorbic and relatedacids.

Of the compounds encompassed by Formula VII, certain combinations ofsubstituents are preferred. For instance, when R₁₃ is hydrogen, then R₁₄is preferably an amino group. When R₁₄ is a hydrazino group, then R ispreferably an amino group.

Representative of the compounds of Formula VII are:

-   3,4-diamino-5-methyl-1,2,4-triazole;    3,5-dimethyl-4H-1,2,4-triazol-4-amine; 4-triazol-4-amine;    4-triazol-4-amine; 4-triazol-4-amine; 2,4-triazole-3,4-diamine;    5-(1-ethylpropyl)-4H-1,2,4-triazole-3,4-diamine;    5-isopropyl-4H-1,2,4-triazole-3,4-diamine;    5-cyclohexyl-4H-1,2,4-triazole-3,4-diamine;    5-methyl-4H-1,2,4-triazole-3,4-diamine;    5-phenyl-4H-1,2,4-triazole-3,4-diamine;    5-propyl-4H-1,2,4-triazole-3,4-diamine;    5-cyclohexyl-4H-1,2,4-triazole-3,4-diamine.

Formula VIII comprises a structure wherein R₁₆ is hydrogen or an aminogroup, R₁₇ is an amino group or a guanidino group when R₁₆ is hydrogen,or R₁₇ is an amino group when R₁₆ is an amino group, R₁₈ and R₁₉ areindependently hydrogen, hydroxy, a lower alkyl group, a lower alkoxygroup, or an aryl group, and includes their biologically orpharmaceutically acceptable acid or alkali addition salts.

The lower alkyl groups in the compounds of Formula VIII preferablycontain 1-6 carbon atoms and include methyl, ethyl, propyl, butyl,pentyl, hexyl, and the corresponding branched chain isomers thereof. Thelower alkoxy groups likewise contain 1-6, and preferably 1-3, carbonatoms, and are illustrated by methoxy, ethoxy, n-propoxy, isopropoxy andthe like.

The aryl groups encompassed by the above formula are those containing6-10 carbon atoms, such as phenyl and lower alkyl substituted-phenyl,e.g., tolyl and xylyl, and phenyl substituted by 1-2 halo, hydroxy orlower alkoxy groups.

The halo atoms in the above Formula VIII may be fluoro, chloro, bromo oriodo.

The biologically or pharmaceutically acceptable salts of the compoundsof Formula VIII are those tolerated by the mammalian body and includeacid addition salts derived from a variety of organic and inorganicacids such as sulfuric, phosphoric, hydrochloric, sulfamic, citric,lactic, maleic, succinic, tartaric, cinnamic, acetic, benzoic, gluconic,ascorbic and related acids. Of the compounds encompassed by Formula VII,certain substituents are preferred. For instance, the compounds whereinR, is an amino group are preferred group.

Representative of the compounds of Formula VIII are:

-   2-guanidinobenzimidazole; 1,2-diaminobenzimidazole;    1,2-diaminobenzimidazole hydrochloride;    5-bromo-2-guanidinobenzimidazole;    5-methoxy-2-guanidinobenzimidazole;    5-methylbenzimidazole-1,2-diamine;    5-chlorobenzimidazole-1,2-diamine; and 2,5-diaminobenzimidazole;

Formula IX, comprising R₂₀—CH—(NHR21)-COOH (IX), is a structural formulawherein R₂₀ is selected from the group consisting of hydrogen; loweralkyl, optionally substituted by one or two hydroxyl, thiol, phenyl,hydroxyphenyl, lower alkylthiol, carboxy, aminocarboxy or amino groupsand R₂₁, is selected from the group of hydrogen and an acyl group; andtheir biocompatible and pharmaceutically acceptable acid addition salts.R₂₀—CH—(NHR₂₁)—CO₂H  IX

The lower alkyl groups of the compounds of Formula IX contain 1-6 carbonatoms and include methyl, ethyl, propyl, butyl, pentyl, hexyl and thecorresponding branched chain isomers thereof.

The acyl groups referred to herein are residues of lower alkyl, aryl andheteroaryl carboxylic acids containing 2-10 carbon atoms. They aretypified by acetyl, propionyl, butanoyl, valeryl, hexanoyl and thecorresponding higher chain and branched chain analogs thereof. The acylradicals may also contain one or more double bonds and/or an additionalacid functional group e.g., glutaryl or succinyl.

The amino acids utilized herein can possess either the L & D;stereochemical configuration or be utilized as mixtures thereof.However, the L-configuration is preferred.

Equivalent to the compounds of Formula IX for the purposes of thisinvention are the biocompatible and pharmaceutically acceptable saltsthereof. Such salts can be derived from a variety of inorganic andorganic acids such as methanesulfonic, hydrochloric, toluenesulfonic,sulfuric, maleic, acetic, phosphoric and related acids.

Representative compounds of the compounds of Formula IX are: lysine;

2,3-diaminosuccinic acid; cysteine and the biocompatible andpharmaceutically acceptable salts thereof.

Formula X comprises a structure wherein R₂₂ and R₂₃ are independentlyhydrogen, an amino group or a mono- or di-amino lower alkyl group, R₂₄and R₂₅ are independently hydrogen, a lower alkyl group, an aryl group,or an acyl group with the proviso one of R₂₂ and R₂₃ must be an aminogroup or an mono- or diamino lower alkyl group, and includes theirbiologically or pharmaceutically acceptable acid or alkali additionsalts.

The lower alkyl groups of the compounds of Formula X contain 1-6 carbonatoms and include methyl, ethyl, propyl, butyl, pentyl, hexyl, and thecorresponding branched-chain isomers thereof. The mono- or di-aminoalkyl groups are lower alkyl groups substituted in the chain by one ortwo amino groups.

The aryl groups referred to herein encompass those containing 6-10carbon atoms, such as phenyl and lower alkyl substituted-phenyl, e.g.,tolyl and xylyl, and phenyl substituted by 1-2 halo, hydroxy and loweralkoxy groups. The acyl groups referred to herein are residues of loweralkyl, aryl and heteroaryl carboxylic acids containing 2-10 carbonatoms. They are typified by acetyl, propionyl, butanoyl, valeryl,hexanoyl and the corresponding higher chain and branched chain analogsthereof. The acyl radicals may also contain one or more double bondsand/or an additional acid functional group, e.g., glutaryl or succinyl.

The heteroaryl groups referred to above encompass aromatic heterocyclicgroups containing 3-6 carbon atoms and one or more heteroatoms such asoxygen, nitrogen or sulfur.

The halo atoms in the above Formula X may be fluoro, chloro, bromo andiodo. The lower alkoxy groups contain 1-6, and preferably 1-3, carbonatoms and are illustrated by methoxy, ethoxy, propoxy, isopropoxy andthe like.

The term biologically or pharmaceutically acceptable salts refers tosalts which are tolerated by the mammalian body and are exemplified byacid addition salts derived from a variety of organic and inorganicacids such as sulfuric, phosphoric, hydrochloric hydrobromic,hydroiodic, sulfamic, citric, lactic, maleic, succinic, tartaric,cinnamic, acetic, benzoic, gluconic, ascorbic and related acids.

Of the compounds encompassed by Formula X, certain combinations ofsubstituents are preferred. For instance, when R₂₂ and R₂₃ are bothamino groups, then R₂₄ and R₂₅ are preferably both hydrogen atoms. WhenR₂₂ or R₂₃ is amino group and one of R₂₄ or R₂₅ is an aryl group, theother of R₂₄ and R₂₅ is preferably hydrogen.

Representative compounds of Formula X are:1,2-diamino-4-phenyl[1H]imidazole; 1,2-diaminoimidazole;1-(2,3-diaminopropyl)imidazole trihydrochloride;4-(4-bromophenyl)imidazole-1,2-diamine;4-(4-chlorophenyl)imidazole-1,2-diamine;4-(4-hexylphenyl)imidazole-1,2-diamine;4-(4-methoxyphenyl)imidazole-1,2-diamine;4-phenyl-5-propylimidazole-1,2-diamine; 1,2-diamino-4-methylimidazole;1,2-diamino-4,5-dimethylimidazole; and1,2-diamino-4-methyl-5-acetylimidazole.

Formula XI comprises a structure wherein R₂₆ is a hydroxy, lower alkoxy,amino, amino lower alkoxy, mono-lower alkylamino lower alkoxy, di-loweralkylamino lower alkoxy or hydrazino group, or a group of the formula—NR₂₉R₃₀, wherein R₂₉ is hydrogen or lower alkyl, and R₃₀ is an alkylgroup of 1-20 carbon atoms, an aryl group, a hydroxy lower alkyl group,a carboxy lower alkyl group, cyclo lower alkyl group or a heterocyclicgroup containing 4-7 ring members and 1-3 heteroatoms; or R₂₉ and R₃₀together with the nitrogen form a morpholino, piperidinyl, orpiperazinyl group; or when R₂₉ is hydrogen, then R₃₀ can also be ahydroxy group; R₂₇ is 0-3 amino or nitro groups, and/or a hydrazinogroup, a hydrazinosulfonyl group, a hydroxyethylamino or an amidinogroup; R₂₈ is hydrogen or one or two fluoro, hydroxy, lower alkoxy,carboxy, lower alkylamino, di-lower alkylamino or a hydroxy loweralkylamino groups; with the proviso that when R₂₆ is hydroxy or loweralkoxy, then R₂₇ is a non-hydrogen substituent; with the further provisothat when R₂₆ is hydrazino, then there must be at least two non-hydrogensubstituents on the phenyl ring; and with the further proviso that whenR₂₈ is hydrogen, then R₃₀ can also be an aminoimino, guanidyl,aminoguanidinyl or diaminoguanidyl group, and includes theirpharmaceutically acceptable salts and hydrates.

The lower alkyl groups of the compounds of Formula XI contain 1-6 carbonatoms and include methyl, ethyl, propyl, butyl, pentyl, hexyl, and thecorresponding branched-chain isomers thereof. The cycloalkyl groupscontain 4-7 carbon atoms and are exemplified by groups such ascyclobutyl, cyclopentyl, cyclohexyl, 4-methylcyclohexyl and cycloheptylgroups.

The heterocyclic groups of the compounds of Formula XI include 4-7membered rings having at least one and up to 3 heteroatoms, e.g.,oxygen, nitrogen, or sulfur, therein, and including various degrees ofunsaturation.

Representatives of such heterocyclic groups are those such asmorpholino, piperidino, homopiperidino, piperazino, methylpiperazino,hexamethyleneimino, pyridyl, methylpyridyl, imidazolyl, pyrrolidinyl,2,6-dimethylmorpholino, furfural, 1,2,4-triazoylyl, thiazolyl,thiazolinyl, methylthiazolyl, and the like.

Equivalent to the compounds of Formula XI for the purposes of thisinvention are the biocompatible and pharmaceutically acceptable saltsand hydrates thereof. Such salts can be derived from a variety oforganic and inorganic acids, including, but not limited to,methanesulfonic, hydrochloric, hydrobromic, hydroiodic, toluenesulfonic,sulfuric, maleic, acetic and phosphoric acids.

When the compounds of Formula XI contain one or more asymmetric carbonatoms, mixtures of enantiomers, as well as the pure (R) or (S)enantiomeric form can be utilized in the practice of this invention.

In addition, compounds having a 3,4-diamino- or 2,3-diamino-5-fluorosubstituent pattern on the phenyl ring are highly preferred.

Representative compounds of formula XI of the present invention are:

-   4-(cyclohexylamino-carbonyl)-o-phenylene diamine hydrochloride;    3,4-diaminobenzhydrazide;    4-(n-butylamino-carbonyl)-o-phenylene-diamine dihydrochloride;    4-(ethylamino-carbonyl)-o-phenylene-diamine dihydrochloride;    4-carbamoyl-o-phenylene diamine hydrochloride;    4-(morpholino-carbonyl)-o-phenylene-diamine hydrochloride;    4-[(4-morpholino)hydrazino-carbonyl]-o-phenylenediamine;    4-(1-piperidinylamino-carbonyl)-o-phenylenediamine dihydrochloride;    2,4-diamino-3-hydroxybenzoic acid; 4,5-diamino-2-hydroxybenzoic    acid; 3,4-diaminobenzamide; 3,4-diaminobenzhydrazide;    3,4-diamino-N,N-bis(1-methylethyl)benzamide;    3,4-diamino-N,N-diethylbenzamide; 3,4-diamino-N,N-dipropylbenzamide;    3,4-diamino-N-(2-furanylmethyl)benzamide    3,4-diamino-N-(2-methylpropyl)benzamide; benzamide;    3,4-diamino-N-(5-methyl-2-thiazolyl)benzamide;    3,4-diamino-N-(6-methoxy-2-benzothiazolyl)benzamide;    3,4-diamino-N-(6-methoxy-8-quinolinyl)benzamide;    3,4-diamino-N-(6-methyl-2-pyridinyl)benzamide;    3,4-diamino-N-(1H-benzimidazol-2-yl)benzamide;    3,4-diamino-N-(2-pyridinyl)benzamide;    3,4-diamino-N-(2-thiazolyl)benzamide;    3,4-diamino-N-(4-pyridinyl)benzamide;    3,4-diamino-N-[9H-pyrido(3,4-b)indol-6-yl] benzamide    3,4-diamino-N-butylbenzamide; 3,4-diamino-N-cyclohexylbenzamide;    3,4-diamino-N-cyclopentylbenzamide; 3,4-diamino-N-decylbenzamide;    3,4-diamino-N-dodecylbenzamide; 3,4-diamino-N-methylbenzamide;    3,4-diamino-N-octylbenzamide; 3,4-diamino-N-pentylbenzamide;    3,4-diamino-N-phenylbenzamide; 4-(diethylamino-carbonyl)-o-phenylene    diamine; 4-(tert-butylamino-carbonyl)-o-phenylene diamine;    4-isobutylamino-carbonyl)-o-phenylene diamine;    4-(neopentylamino-carbonyl)-o-phenylene diamine;    4-(dipropylamino-carbonyl)-o-phenylene diamine;    4-(n-hexylamino-carbonyl)-o-phenylene diamine;    4-(n-decylamino-carbonyl)-o-phenylene diamine;    4-(n-dodecylamino-carbonyl)-o-phenylene diamine;    4-(1-hexadecylamino-carbonyl)-o-phenylene diamine;    4-(octadecylamino-carbonyl)-o-phenylene diamine;    4-(hydroxylamino-carbonyl)-o-phenylene diamine;    4-(2-hydroxyethylamino-carbonyl)-o-phenylene;    4-[(2-hydroxyethylamino)ethylamino-carbonyl]-o-phenylene diamine;    4-[(2-hydroxyethyloxy)ethylamino-carbonyl]-o-phenylene diamine;    4-(6-hydroxyhexylamino-carbonyl)-o-phenylene diamine;    4-(3-ethoxypropylamino-carbonyl)-o-phenylene diamine;    4-(3-isopropoxypropylamino-carbonyl)-o-phenylene diamine;    4-(3-dimethylaminopropylamino-carbonyl)-o-phenylene diamine;    4-[4-(2-aminoethyl)morpholino-carbonyl]-o-phenylene diamine;    4-[4-(3-aminopropyl) morpholino-carbonyl]-o-phenylene diamine;    4-N-(3-aminopropyl)pyrrolidino-carbonyl]-o-phenylene diamine;    4-[3-(N-piperidino)propylamino-carbonyl]-O— phenylene diamine;    4-[3-(4-methylpiperazinyl)propylamino-carbonyl]-o-phenylene diamine;    4-(3-imidazoylpropylamino-carbonyl)-o-phenylene diamine;    4-(3-phenylpropylamino-carbonyl)-o-phenylenediamine;    4-[2-(N,N-diethylamino)ethylamino-carbonyl]-o-phenylene diamine;    4-(imidazolylamino-carbonyl)-o-phenylene diamine;    4-(pyrrolidinyl-carbonyl)-o-phenylene diamine;    4-(piperidino-carbonyl)-o-phenylene diamine;    4-(1-methylpiperazinyl-carbonyl)-o-phenylene diamine;    4-(2,6-dimethylmorpholino-carbonyl)-o-phenylenediamine;    4-(pyrrolidin-1-ylamino-carbonyl)-o-phenylene diamine;    4-(homopiperidin-1-ylamino-carbonyl)-o-phenylene diamine;    4-(4-methylpiperazine-1-ylamino-carbonyl)-o-phenylene diamine;    4-(1,2,4-triazol-1-ylamino-carbonyl)-o-phenylene diamine;    4-(guanidinyl-carbonyl)-o-phenylene diamine;    4-(guanidinylamino-carbonyl)-o-phenylene diamine;    4-aminoguanidinylamino-carbonyl)-o-phenylene diamine;    4-(diaminoguanidinylamino-carbonyl)-o-phenylene diamine;    3,4-aminosalicylic acid 4-guanidinobenzoic acid;    3,4-diaminobenzohydroxamic acid; 3,4,5-triaminobenzoic acid;    2,3-diamino-5-fluoro-benzoic acid; and 3,4-diaminobenzoic acid; and    their pharmaceutically acceptable salts and hydrates.

Formula XII comprises a structure wherein R₃₁, is hydrogen, a loweralkyl or hydroxy group; R₃₂ is hydrogen, hydroxy lower alkyl, a loweralkoxy group, a lower alkyl group, or an aryl group; R₃₃ is hydrogen oran amino group; and their biologically or pharmaceutically acceptableacid addition salts.

The lower alkyl groups of the compounds of Formula XII contain 1-6carbon atoms and include methyl, ethyl, propyl, butyl, pentyl, hexyl,and the corresponding branched-chain isomers thereof. Likewise, thelower alkoxy groups contain 1-6, and preferably 1-3, carbon atoms andinclude methoxy, ethoxy, isopropoxy, propoxy, and the like. The hydroxylower alkyl groups include primary, secondary and tertiary alcoholsubstituent patterns.

The aryl groups of the compounds of Formula XII encompass thosecontaining 6-10 carbon atoms, such as phenyl and lower alkylsubstituted-phenyl, e.g., tolyl and xylyl, and phenyl substituted by 1-2halo, hydroxy and lower alkoxy groups.

The halo atoms in the above Formula XII may be fluoro, chloro, bromo,and iodo.

The term biologically or pharmaceutically acceptable salts refers tosalts which are tolerated by the mammalian body and are exemplified byacid addition salts derived from a variety of organic and inorganicacids such as sulfuric, phosphoric, hydrochloric hydrobromic,hydroiodic, sulfamic, citric, lactic, maleic, succinic, tartaric,cinnamic, acetic, benzoic, gluconic, ascorbic and related acids.

Of the compounds encompassed by Formula XII, certain substituents arepreferred. For instance, the compounds wherein R₃₂ is hydroxy and R₃₃ isan amino group are preferred.

Representative of the compounds of Formula XII are:

-   3,4-diaminopyrazole; 3,4-diamino-5-hydroxypyrazole;    3,4-diamino-5-methylpyrazole 3,4-diamino-5-methoxypyrazole;    3,4-diamino-5-phenylpyrazole;    1-methyl-3-hydroxy-4,5-diaminopyrazole;    1-(2-hydroxyethyl)-3-hydroxy-4,5-diaminopyrazole;    1-(2-hydroxyethyl)-3-phenyl-4,5-diaminopyrazole;    1-(2-hydroxyethyl)-3-methyl-4,5-diaminopyrazole;    1-(2-hydroxyethyl)-4,5-diaminopyrazole;    1-(2-hydroxypropyl)-3-hydroxy-4,5-diaminopyrazole;    3-amino-5-hydroxypyrazole; and    1-(2-hydroxy-2-methylpropyl)-3-hydroxy-4,5-diaminopyrazole; and    their biologically and pharmaceutically acceptable acid addition    salts.

Formula XIII comprises a structure where n=1-6, wherein X is —NR₁—,—S(O)—, —S(O)₂—, or —O—, R₁ being selected from the group consisting ofH, linear chain alkyl group (C₁-C₆) and branched chain alkyl group(C₁-C₆). Y=—N—, —NH—, or —O— and Z is selected from the group consistingof H, linear chain alkyl group (C₁-C₆) and branched chain alkyl group(C₁-C₆).

For Formula XIV, wherein R₃₇ is a lower alkyl group, or a group of theformula NR41NR42, wherein R₄₁ is hydrogen and R₄₂ is a lower alkyl groupor a hydroxy (lower) alkyl group; or R₄₁ and R₄₂ together with thenitrogen atom are a heterocyclic group containing 4-6 carbon atoms and,in addition to the nitrogen atom, 0-1 oxygen, nitrogen or sulfur atoms;R₃₈ is hydrogen or an amino group; R₃₉ is hydrogen or an amino group;R₄₀ is hydrogen or a lower alkyl group; with the proviso that at leastone of R₃₈, R₃₉, and R₄₀ is other than hydrogen; and with the furtherproviso that R₃₇ and R₃₈ cannot both be amino groups; and theirpharmaceutically acceptable acid addition salts.

The lower alkyl groups of the compounds of Formula XIV contain 1-6carbon atoms and include methyl, ethyl, propyl, butyl, pentyl, hexyl,and the corresponding branched-chain isomers thereof.

The heterocyclic groups formed by the NR41R₄₂ group are 4-7 memberedrings having at 0-1 additional heteroatoms, e.g., oxygen, nitrogen, orsulfur, therein, and including various degrees of unsaturation.Representatives of such heterocyclic groups are those such asmorpholino, piperidino, hexahydroazepino, piperazino, methylpiperazino,hexamethyleneimino, pyridyl, methylpyridyl, imidazolyl, pyrrolidinyl,2,6-dimethylmorpholino, 1,2,4-triazoylyl, thiazolyl, thiazolinyl, andthe like.

Equivalent to the compounds of Formula XIV for the purposes of thisinvention are the biocompatible and pharmaceutically acceptable saltsthereof. Such salts can be derived from a variety of organic andinorganic acids, including, but not limited to, methanesulfonic,hydrochloric, hydrobromic, hydroiodic, toluenesulfonic, sulfuric,maleic, acetic and phosphoric acids.

When the compounds of Formula XIV contain one or more asymmetric carbonatoms, mixtures of enantiomers, as well as the pure (R) or (S)enantiomeric form can be utilized in the practice of this invention.

Of the compounds encompassed by Formula XIV, certain combinations ofsubstituents are preferred. For instance, compounds wherein R₃₇ is aheterocyclic group, and particularly a morpholino or a hexahydroazepinogroup, are highly preferred.

Representative of the compounds of Formula XIV are:2-(2-hydroxy-2-methylpropyl)hydrazinecarboximidic hydrazide;N-(4-morpholino)hydrazinecarboximidamide;1-methyl-N-(4-morpholino)hydrazinecarboximidamide;1-methyl-N-(4-piperidino)hydrazinecarboximidamide;1-(N-hexahydroazepino)hydrazinecarboximidamide; N,N-dimethylcarbonimidicdihydrazide; 1-methylcarbonimidic dihydrazide;2-(2-hydroxy-2-methylpropyl)carbohydrazonic dihydrazide; andN-ethylcarbonimidic dihydrazide.

Formula XV is a structure comprising (R43HN═)CR44-W—CR45 (═NHR43) (XV);wherein R₄₃ is pyridyl, phenyl or a carboxylic acid substituted phenylgroup of the formula; wherein R₄₆ is hydrogen, lower alkyl or awater-solubilizing ester moiety; W is a carbon-carbon bond or analkylene group of 1-3 carbon atoms, R₄₄ is a lower alkyl, aryl, orheteroaryl group and R₄₅ is hydrogen, a lower alkyl, aryl or heteroarylgroup; and it includes their biologically or pharmaceutically acceptableacid addition salts.

The lower alkyl groups of the compounds of Formula XV preferably contain1-6 carbon atoms and include methyl, ethyl, propyl, butyl, pentyl,hexyl, and the corresponding branched-chain isomers thereof. Thesegroups are optionally substituted by one or more halo, hydroxy, amino orlower alkylamino groups.

The alkylene groups of the compounds of Formula XV likewise can bestraight or branched chain, and are thus exemplified by ethylene,propylene, butylene, pentylene, hexylene, and their correspondingbranched chain isomers.

In the R groups which are a carboxylic acid substituted phenyl group ofthe formula:

wherein R₄₄ is hydrogen, lower alkyl or a water-solubilizing estermoiety, the water solubilizing ester moiety can be selected from avariety of such esters known in the art. Typically, these esters arederived from dialkylene or trialkylene glycols or ethers thereof,dihydroxyalkyl groups, arylalkyl group, e.g., nitrophenylalkyl andpyridylalkyl groups, and carboxylic acid esters and phosphoric acidesters of hydroxy and carboxy-substituted alkyl groups. Particularlypreferred water solubilizing ester moieties are those derived from2,3-dihydroxypropane, and 2-hydroxyethylphosphate.

The aryl groups encompassed by the above Formula XV are those containing6-10 carbon atoms, such as phenyl and lower alkyl substituted-phenyl,e.g., tolyl and xylyl, and are optionally substituted by 1-2 halo,nitro, hydroxy or lower alkoxy groups.

Where the possibility exists for substitution of a phenyl or aryl ring,the position of the substituents may be ortho, meta, or para to thepoint of attachment of the phenyl or aryl ring to the nitrogen of thehydrazine group.

The halo atoms in the above Formula XV may be fluoro, chloro, bromo oriodo. The lower alkoxy groups contain 1-6, and preferably 1-3, carbonatoms and are illustrated by methoxy, ethoxy, n-propoxy, isopropoxy andthe like.

The heteroaryl groups in the above Formula XV contain 1-2 heteroatoms,i.e., nitrogen, oxygen or sulfur, and are exemplified by furyl,pyrrolinyl, pyridyl, pyrimidinyl, thienyl, quinolyl, and thecorresponding alkyl substituted compounds.

For the purposes of this invention equivalent to the compounds ofFormula XV are the biologically and pharmaceutically acceptable acidaddition salts thereof. Such acid addition salts may be derived from avariety of organic and inorganic acids such as sulfuric, phosphoric,hydrochloric, hydrobromic, sulfamic, citric, lactic, maleic, succinic,tartaric, cinnamic, acetic, benzoic, gluconic, ascorbic, methanesulfonicand related acids.

Of the compounds encompassed by Formula XV, certain substituents arepreferred. For instance, the compounds wherein W is a carbon-carbonbond, R₄₄ is a methyl group and R₄₅ is hydrogen are preferred.

Representative of the compounds of Formula XV are: methylglyoxalbis-(2-hydrazino-benzoic acid)hydrazone; methylglyoxalbis-(dimethyl-2-hydrazinobenzoate)hydrazone; methylglyoxalbis-(phenylhydrazine)hydrazone; methyl glyoxalbis-(dimethyl-2-hydrazinobenzoate)hydrazone; methylglyoxalbis-(4-hydrazinobenzoic acid)hydrazone; methylglyoxalbis-(dimethyl-4-hydrazinobenzoate)hydrazone; methylglyoxalbis-(2-pyridyl)hydrazone; methylglyoxal bis-(diethyleneglycolmethylether-2-hydrazinobenzoate)hydrazone; methylglyoxalbis-[1-(2,3-dihydroxypropane)-2-hydrazinebenzoatehydrazone; methylglyoxal bis-[1-(2-hydroxyethane)-2-hydrazinobenzoate]hydrazone;methylglyoxalbis-[(1-hydroxymethyl-1-acetoxy))-2-hydrazino-2-benzoate]hydrazone;methylglyoxal bis-[(4-nitrophenyl)-2-hydrazinobenzoate]hydrazone;methylglyoxal bis-[(4-methylpyridyl)-2-hydrazinobenzoate]hydrazone;methylglyoxal bis-(triethylene glycol 2-hydrazinobenzoate)hydrazone; andmethylglyoxalbis-(2-hydroxyethylphosphate-2-hydrazinebenzoate)hydrazone.

Formula XVI comprises a structure wherein R₄₇ and R₄₈ are each hydrogenor, together, are an alkylene group of 2-3 carbon atoms, or, when R₄₇ ishydrogen, then R₄₈ can be a group of the formula alk-N—R₅₀R₅₁, whereinalk is a straight or branched chain alkylene group of 1-8 carbon atoms,and R₅₀ and R₅₁ are independently each a lower alkyl group of 1-6 carbonatoms, or together with the nitrogen atom form a morpholino, piperidinylor methylpiperazinyl group; R₄₉ is hydrogen, or when R₄₇ and R₄₈ aretogether an alkylene group of 2-3 carbon atoms, a hydroxyethyl group; Wis a carbon-carbon bond or an alkylene group of 1-3 carbon atoms, andR₅₂ is a lower alkyl, aryl, or heteroaryl group and R₅₃ is hydrogen, alower alkyl, aryl or heteroaryl group; with the proviso that when W is acarbon-carbon bond, then R₅₂ and R₅₃ together can also be a 1,4-butylenegroup; or W is a 1,2-, 1,3-, or 1,4-phenylene group, optionallysubstituted by one or two lower alkyl or amino groups, a 2,3-naphthylenegroup; a 2,5-thiophenylene group; or a 2,6-pyridylene group; and R₅₂ andR₅₃ are both hydrogen or both are lower alkyl groups; or W is anethylene group and R₅₂ and R₅₃ together are an ethylene group; or W isan ethenylene group and R₅₂ and R₅₃ together are an ethenylene group; orW is a methylene group and R₅₂ and R₅₃ together are a group of theformula ═C(—CH₃)—N—(H₃C—)C═ or —C—W—C— and R₅₂ and R₅₃ together form abicyclo-(3,3,1)-nonane or a bicyclo-3,3,1-octane group and R₄₇ and R₄₈are together an alkylene group of 2-3 carbon atoms and R₄₉ is hydrogen;and their biologically or pharmaceutically acceptable acid additionsalts.

The lower alkyl groups of the compounds of Formula XVI preferablycontain 1-6 carbon atoms and include methyl, ethyl, propyl, butyl,pentyl, hexyl, and the corresponding branched-chain isomers thereof.These groups are optionally substituted by one or more halo hydroxy,amino or lower alkylamino groups.

The alkylene groups of the compounds of Formula XVI likewise can bestraight or branched chain, and are thus exemplified by ethylene,propylene, butylene, pentylene, hexylene, and their correspondingbranched chain isomers.

The aryl groups encompassed by the above Formula XVI are thosecontaining 6-10 carbon atoms, such as phenyl and lower alkylsubstituted-phenyl, e.g. tolyl and xylyl, and are optionally substitutedby 1-2 halo, hydroxy or lower alkoxy groups.

The halo atoms in the above Formula XVI may be fluoro, chloro, bromo oriodo. The lower alkoxy groups contain 1-6, and preferably 1-3, carbonatoms and are illustrated by methoxy, ethoxy, n-propoxy, isopropoxy andthe like.

The heteroaryl groups in the above Formula XVI contain 1-2 heteroatoms,i.e. nitrogen, oxygen or sulfur, and are exemplified by be furyl,pyrrolinyl, pyridyl, pyrimidinyl, thienyl, quinolyl, and thecorresponding alkyl substituted compounds.

For the purposes of this invention equivalent to the compounds ofFormula XVI are the biologically and pharmaceutically acceptable acidaddition salts thereof. Such acid addition salts may be derived from avariety of organic an inorganic acids such as sulfuric, phosphoric,hydrochloric, hydrobromic, sulfamic, citric, lactic, maleic, succinic,tartaric, cinnamic, acetic, benzoic, gluconic, ascorbic, methanesulfonicand related acids.

Of the compounds encompassed by Formula XVI, certain substituents arepreferred. For instance, the compounds wherein R₄₈ and R₄₉ are togetheran alkylene group of 2-3 carbon atoms are preferred. The compoundswherein R₅₂ and R₅₃ together are a butylene, ethylene, or an ethenylenegroup and those wherein R₅₂ and R₅₃ are both methyl or furyl groups arealso highly preferred.

Representative of the compounds of Formula XVI are: methyl glyoxal bisguanylhydrazone); methyl glyoxalbis(2-hydrazino-2-imidazoline-hydrazone); terephthaldicarboxaldehydebis(2-hydrazino-2-imidazoline hydrazone); terephaldicarboxaldehydebis(guanylhydrazone); phenylglyoxal bis(2-hydrazino-2-imidazolinehydrazone); furylglyoxal bis(2-hydrazino-2-imidazoline hydrazone);methyl glyoxal bis(1-(2-hydroxyethyl)-2-hydrazino-2-imidazolinehydrazone); methyl glyoxalbis(1-(2-hydroxyethyl)-2-hydrazino-1,4,5,6-tetrahydropyrimidinehydrazone); phenyl glyoxal bis(guanylhydrazone); phenyl glyoxalbis(1-(2-hydroxyethyl)-2-hydrazino-2-imidazoline hydrazone); furylglyoxal bis(1-(2-hydroxyethyl)-2-hydrazino-2-imidazoline hydrazone);phenyl glyoxalbis(1-(2-hydroxyethyl)-2-hydrazino-1,4,5,6-tetrahydropyrimidinehydrazone); furyl glyoxalbis(1-(2-hydroxyethyl)-2-hydrazino-1,4,5,6-tetrahydropyrimidinehydrazone); 2,3-butanedione bis(2-hydrazino-2-imidazoline hydrazone);1,4-cyclohexanedione bis(2-hydrazino-2-imidazoline hydrazone);o-phthalic dicarboxaldehyde bis(2-hyd carboximidamide hydrazone);furylglyoxal bis(guanyl hydrazone)dihydrochloride dihydrate;2,3-pentanedione bis(2-tetrahydropyrimidine)hydrazone dihydrobromide;1,2-cyclohexanedione bis(2-tetrahydropyrimidine)hydrazonedihydrobromide; 2,3-hexanedione bis(2-tetrahydropyrimidine)hydrazonedihydrobromide; 1,3-diacetyl bis (2-tetrahydropyrimidine)hydrazonedihydrobromide; 2,3-butanedione bis(2-tetrahydropyrimidine)hydrazonedihydrobromide; 2,6-diacetylpyridine-bis-(2-hydrazino-2-imidazolinehydrazone)dihydrobromide; 2,6-diacetylpyridine-bis-(guanylhydrazone)dihydrochloride; 2,6-pyridinedicarboxaldehyde-bis-(2-hydrazino-2-imidazoline hydrazone)dihydrobromidetrihydrate); 2,6-pyridine dicarboxaldehyde-bis (guanylhydrazone)dihydrochloride; 1,4-diacetylbenzene-bis-(2-hydrazino-2-imidazoline hydrazone)dihydrobromidedihydrate; 1,3-diacetyl benzene-bis-(2-hydrazino-2-imidazoline)hydrazonedihydrobromide; 1,3-diacetyl benzene-bis (guanyl)-hydrazonedihydrochloride; isophthalaldehyde-bis-(2-hydrazino-2-imidazoline)hydrazone dihydrobromide; isophthalaldehyde-bis-(guanyl)hydrazonedihydrochloride; 2,6-diacetylaniline bis-(guanyl)hydrazonedihydrochloride; 2,6-diacetyl anilinebis-(2-hydrazino-2-imidazoline)hydrazone dihydrobromide;2,5-diacetylthiophene bis(guanyl)hydrazone dihydrochloride;2,5-diacetylthiophene bis-(2-hydrazino-2-imidazoline)hydrazonedihydrobromide; 1,4-cyclohexanedionebis(2-tetrahydropyrimidine)hydrazone dihydrobromide; 3,4-hexanedionebis(2-tetrahydropyrimidine)hydrazone dihydrobromide;methylglyoxal-bis-(4-amino-3-hydrazino-1,2,4-triazole)hydrazonedihydrochloride;methylglyoxal-bis-(4-amino-3-hydrazino-5-methyl-1,2,4-triazole)hydrazonedihydrochloride;2,3-pentanedione-bis-(2-hydrazino-3-imidazoline)hydrazonedihydrobromide; 2,3-hexanedione-bis-(2-hydrazino-2-imidazoline)hydrazonedihydrobromide; 3-ethyl-2,4-pentanedione-bis-(2-hydrazino-2-imidazoline)hydrazone dihydrobromide;methylglyoxal-bis-(4-amino-3-hydrazino-5-ethyl-1,2,4-triazole)hydrazonedihydrochloride;methylglyoxal-bis-(4-amino-3-hydrazino-5-isopropyl-1,2,4-triazole)hydrazonedihydrochloride; methylglyoxal-bis-(4-amino-3-hydrazino-5-cyclopropyl-1,2,4-triazole)hydrazonedihydrochlorimethylglyoxal-bis-(4-amino-3-hydrazino-5-cyclobutyl-1,2,4-triazole)hydrazonedihydrochloride;1,3-cyclohexanedione-bis-(2-hydrazino-2-imidazoline)hydrazonedihydrobromide; 6-dimethylpyridine bis(guanyl)hydrazone dihydrochloride;3,5-diacetyl-1,4-dihydro-2,6-dimethylpyridinebis-(2-hydrazino-2-imidazoline hydrazone dihydrobromide;bicyclo-(3,3,1)nonane-3,7-dione bis-(2-hydrazino-2-imidazoline)hydrazonedihydrobromide; and cis-bicyclo-(3,3,1)octane-3,7-dionebis-(2-hydrazino-2-imidazoline)hydrazone dihydrobromide.

Figure XVII comprises a structure wherein R₅₄ and R₅₅ are independentlyselected from the group consisting of hydrogen, hydroxy (lower) alkyl,lower acyloxy (lower) alkyl, lower alkyl, or R₅₄ and R₅₅ together withtheir ring carbons may be an aromatic fused ring; Za is hydrogen or anamino group;

Ya is hydrogen, or a group of the formula —CH₂C(═O)—R₅₆ wherein R is alower alkyl, alkoxy, hydroxy, amino or aryl group; or a group of theformula —CHR′ wherein R′ is hydrogen, or a lower alkyl, lower alkynyl,or aryl group; and A is a halide, tosylate, methanesulfonate ormesitylenesulfonate ion.

The lower alkyl groups of the compounds of Formula XVII contain 1-6carbon atoms and include methyl, ethyl, propyl, butyl, pentyl, hexyl,and the corresponding branched-chain isomers thereof. The lower alkynylgroups contain from 2 to 6 carbon atoms. Similarly, the lower alkoxygroups contain from 1 to 6 carbon atoms, and include methoxy, ethoxy,propoxy, butoxy, pentoxy, and hexoxy, and the correspondingbranched-chain isomers thereof. These groups are optionally substitutedby one or more halo, hydroxy, amino or lower alkylamino groups.

The lower acyloxy (lower) alkyl groups encompassed by the above FormulaXVII include those wherein the acyloxy portion contain from 2 to 6carbon atoms and the lower alkyl portion contains from 1 to 6 carbonatoms.

Typical acyloxy portions are those such as acetoxy or ethanoyloxy,propanoyloxy, butanoyloxy, pentanoyloxy, hexanoyloxy, and thecorresponding branched chain isomers thereof. Typical lower alkylportions are as described herein above. The aryl groups encompassed bythe above formula are those containing 6-10 carbon atoms, such as phenyland lower alkyl substituted-phenyl, e.g., tolyl and xylyl, and areoptionally substituted by 1-2 halo, hydroxy, lower alkoxy or di (lower)alkylamino groups. Preferred aryl groups are phenyl, methoxyphenyl and4-bromophenyl groups.

The halo atoms in the above Formula XVII may be fluoro, chloro, bromo,or iodo.

For the purposes of this invention, the compounds of Formula XVII areformed as biologically and pharmaceutically acceptable salts. Usefulsalt forms are the halides, particularly the bromide and chloride,tosylate, methanesulfonate, and mesitylenesulfonate salts. Other relatedsalts can be formed using similarly non-toxic, and biologically andpharmaceutically acceptable anions.

Of the compounds encompassed by Formula XVII, certain substituents arepreferred. For instance, the compounds wherein R₅₄ or R₅₅ are loweralkyl groups are preferred. Also highly preferred are the compoundswherein Ya is a 2-phenyl-2-oxoethyl or a 2-[4′-bromophenyl]-2-oxoethylgroup.

Representative of the compounds of Formula XVII are: 3-aminothiazoliummesitylenesulfonate; 3-amino-4,5-dimethylaminothiazoliummesitylenesulfonate; 2,3-diaminothiazolinium mesitylenesulfonate;3-(2-methoxy-2-oxoethyl)-thiazolium bromide;3-(2-methoxy-2-oxoethyl)-4,5-dimethylthiazolium bromide;3-(2-methoxy-2-oxoethyl)-4-methylthiazolium bromide;3-(2-phenyl-2-oxoethyl)-4-methylthizolium bromide;3-(2-phenyl-2-oxoethyl)-4,5-dimethylthiazolium bromide;3-amino-4-methylthiazolium mesitylenesulfonate;3-(2-methoxy-2-oxoethyl)-5-methylthiazolium bromide;3-(3-(2-phenyl-2-oxoethyl)-5-methylthiazolium bromide;3-[2-(4′-bromophenyl)-2-oxoethyl] thiazolium bromide;3-[2-(4′-bromophenyl)-2-oxoethyl]-4-methylthiazolium bromide;3-[2-(4′-bromophenyl)-2-oxoethyl]-5-methylthiazolium bromide;3-[2-(4′bromophenyl)-2-oxoethyl]-4,5-dimethylthiazolium bromide;3-(2-methoxy-2-oxoethyl)-4-methyl-5-(2-hydroxyethyl)thiazolium bromide;3-(2-phenyl-2-oxoethyl)-4-methyl-5-(2-hydroxyethyl)thiazolium bromide;3-[2-(4′-bromophenyl)-2-oxoethyl]-4-methyl-5-(2-hydroxyethyl)thiazoliumbromide; 3,4-dimethyl-5-(2-hydroxyethyl)thiazolium iodide;3-ethyl-5-(2-hydroxyethyl)-4-methylthiazolium bromide;3-benzyl-5-(2-hydroxyethyl)-4-methylthiazolium chloride;3-(2-methoxy-2-oxoethyl)benzothiazolium bromide;3-(2-phenyl-2-oxoethyl)benzothiazolium bromide;3-[2-(4′bromophenyl)-2-oxoethyl] benzothiazolium bromide;3-(carboxymethyl)benzothiazolium bromide; 2,3-(diamino)benzothiazoliummesitylenesulfonate; 3-(2-amino-2-oxoethyl)thiazolium bromide;3-(2-amino-2-oxoethyl)-4-methylthiazolium bromide;3-(2-amino-2-oxoethyl)-5-methylthiazolium bromide;3-(2-amino-2-oxoethyl)4,5-dimethylthiazolium bromide;3-(2-amino-2-oxoethyl)benzothiazolium bromide;3-(2-amino-2-oxoethyl)4-methyl-5-(2-hydroxyethyl)thiazolium bromide;3-amino-5-(2-hydroxyethyl)-4-methylthiazolium mesitylenesulfonate;3-(2-methyl-2-oxoethyl)thiazolium chloride;3-amino-4-methyl-5-(2-acetoxyethyl)thiazolium mesitylenesulfonate;3-(2-phenyl-2-oxoethyl)thiazolium bromide;3-(2-methoxy-2-oxoethyl)-4-methyl-5-(2-acetoxyethyl) thiazoliumbromide;3-(2-amino-2-oxoethyl)-4-methyl-5-(2-acetoxyethyl)thiazolium bromide;2-amino-3-(2-methoxy-2-oxoethyl)thiazolium bromide;2-amino-3-(2-methoxy-2-oxoethyl)benzothiazolium bromide;2-amino-3-(2-amino-2-oxoethyl)thiazolium bromide;2-amino-3-(2-amino-2-oxoethyl)benzothiazolium bromide;3-[2-(4′-methoxyphenyl)-2-oxoethyl]-thiazolinium bromide;3-[2-(2′,4′-dimethoxyphenyl)-2-oxoethyl]-thiazolinium bromide;3-[2-(4′-fluorophenyl)-2-oxoethyl]-thiazolinium bromide;3-[2-(2′,4′-difluorophenyl)-2-oxoethyl]-thiazolinium bromide;3-[2-(4′-diethylaminophenyl)-2-oxoethyl]-thiazolinium bromide;3-propargyl-thiazolinium bromide; 3-propargyl-4-methylthiazoliniumbromide; 3-propargyl-5-methylthiazolinium bromide;3-propargyl-4,5-dimethylthiazolinium bromide; and3-propargyl-4-methyl-5-(2-hydroxyethyl)-thiazolinium bromide.

Formula XVIII comprises a structure wherein, R₅₇ is OH, NHCONCR₆₁R₆₂, orN═C(NR₆₁R₆₂)₂;

R₆₁ and R₆₂ are each independently selected from the group consistingof: hydrogen; C₁₋₁₀ alkyl, straight or branched chain; aryl C₁₋₄ alkyl;and mono- or di-substituted aryl C₁₋₄ alkyl, where the substituents arefluoro, chloro, bromo, iodo or C₁₋₁₀ alkyl, straight or branched chain;

further wherein R₅₈ and R₅₉ are each independently selected from thegroup consisting of hydrogen, amino, and mono- or di-substituted aminowhere the substituents are C₁₋₁₀ alkyl, straight or branched chain C₃₋₈,cycloalkyl; provided that R₅₈ and R₅₉ may not both be amino orsubstituted amino; and

R₆₀ is hydrogen, trifluoromethyl; fluoro; chloro; bromo; or iodo; or apharmaceutically acceptable salt thereof

In another aspect of the invention, the inhibitor of 3DG function can bea compound such as the amino acid arginine, which reacts irreversiblywith 3DG to form a five membered ring called an imidazolone. Once thereaction occurs, 3DG cannot cause crosslinking because the activecrosslinker has been removed. Thus, the binding of arginine with 3DGprevents protein crosslinking (see Example 18 and FIG. 12). As describedherein, treatment of collagen with 3DG causes the collagen to migrateelectrophoretically as if it had a higher molecular weight, which isindicative of crosslinking. However, treatment of a sample of collagenwith 3DG in the presence of arginine prevented the appearance of moreslowly migrating proteins (Example 18 and FIG. 12). Arginine should beconstrued to inhibit other alpha-dicarbonyl sugars as well. Theinvention should be construed to include not just arginine, but itshould also be construed to include derivatives and modificationsthereof. In one aspect of the invention, arginine may be derivatized ormodified to ensure greater efficiency of penetration or passage into theskin or other tissues or to ensure a more efficacious result.

The amino acid arginine has the structure:

In yet another aspect of the invention, the inhibitor of 3DG or otheralpha-dicarbonyl sugar function may be L-cysteine or a derivative suchas an α-amino-β,β-mercapto-β,β-dimethyl-ethane, or a derivative ormodification thereof. Members of theα-amino-β,β-mercapto-β,β-dimethyl-ethane family include, but are notlimited to, compounds such as D-penicillamine, L-penicillamine, andD,L-penicillamine (see Jacobson et al., WO 01/78718). The functionsinhibited include, but are not limited to, the various functionsdescribed herein, such as inhibiting crosslinking of proteins and othermolecules, as well as other functions which cause damage to moleculessuch as proteins, lipid and DNA. For example, damage to lipids mayinclude lipid peroxidation and damage to DNA may include damage such asmutagenesis.

In one aspect of the invention, anα-amino-β,β-mercapto-β,β-dimethyl-ethane may be derivatized or modifiedto ensure greater efficiency of penetration or passage into the skin orother tissues or to ensure greater efficiency in inhibiting the desiredfunction of 3DG and other alpha-dicarbonyl sugars.

For example, the α-amino-β,β-mercapto-β,β-dimethyl-ethane derivative,D-penicillamine, has the structure:

It should be understood that the compounds described herein are not theonly compounds capable of inhibiting 3DG function or of treating a 3DGassociated skin disease or disorder or diseases and disorders of othertissues and cells. It will be recognized by one of skill in the art thatthe various embodiments of the invention as described herein related toinhibition of 3DG function, also encompass other methods and compoundsuseful for inhibiting 3DG function. It will also be recognized by one ofskill in the art that other compounds and techniques can be used topractice the invention. The invention should be construed to includecompounds and methods useful not merely for the their ability to inhibit3DG function and to treat a 3DG associated skin disease or disorder, butshould be construed to also include the ability to inhibit the functionof other members of the alpha-dicarbonyl sugar family of compounds,including glyoxal, methyl glyoxal and glucosone. The invention shouldalso be construed to include treating 3DG associated diseases anddisorders other than those of skin, such as 3DG associated diseases anddisorders of the gums.

Methods of Identifying Compounds Which Inhibit 3DG and OtherAlpha-Dicarbonyl Sugar Synthesis, Production, Accumulation, and Function

The invention includes various methods for the identification ofadditional compounds that are useful as 3DG inhibitors. Such methodsinclude the use of test compounds in screening assays that are designedto measure the effects of the test compounds on 3DG synthesis,production, formation, accumulation, function and detoxification. 3DGsynthesis, production, formation, accumulation, function anddetoxification may be measured in the various assays described herein,and thus the effect of a test compound on 3DG synthesis, production,formation, accumulation, function and detoxification may also bemeasured in these assays. Similarly, the ability of a test compound toaffect the synthesis, production, formation, accumulation, function, anddetoxification of other alpha-dicarbonyl sugars may be measured as well.

In one aspect, the method used for screening a potential inhibitor of3DG synthesis includes the use of one or more assays for measuringfructosamine kinase/amadorase activity or amadorase mRNA levels (seeExamples 17, 21, and 22). In another aspect, such an assay utilizes ³¹PNMR analysis to measure the conversion of FL3P to 3DG and FL (seeExample 3). In yet another aspect, the method used for screening aninhibitor of 3DG synthesis includes a method for measuring the levels of3DG in a sample or for measuring its degradation product, 3DF, in asample. For example, 3DG obtained in a sample such as urine, saliva,plasma, blood, tissue, sweat, or cells can be measured using gaschromatography-mass spectroscopy and 3DF can be measured using HPLC, asdescribed herein (see Examples 5, 14, and 15). FL can also be measuredusing HPLC. Assays to determine the levels of the various componentsdescribed above can be performed on cells, tissues, blood, plasma,sweat, saliva, and urine samples obtained from an animal, preferably ahuman. In yet another embodiment, the invention includes theidentification of compounds, including, but not limited to, smallmolecules, drugs or other agents, for their ability to disrupt 3DGfunction or the interactions of 3DG with other molecules to cause theformation of crosslinked proteins. One assay is based on the ability of3DG to induce the formation of crosslinked proteins. The inventionshould be construed to include crosslinking of molecules such ascollagen, elastin, and proteoglycans. In one aspect, the invention alsoincludes the identification of compounds based on their ability todisrupt the function of other members of the alpha-dicarbonyl sugarfamily of compounds, including glyoxal, methyl glyoxal, and glucosone.

In one embodiment, the invention includes identification of compoundswhich inhibit a component of an enzymatic pathway of 3DG synthesis. Suchcompounds include those of structural formula XIX. In one aspect, theinvention includes a method of identifying a compound which inhibits 3DGsynthesis in the skin of a mammal. Such a method may compriseadministering a test compound to said mammal and comparing the level of3DG synthesis in the skin of said mammal with the level of 3DG synthesisin the skin of an otherwise identical mammal which was not administeredsaid test compound. A lower level of 3DG synthesis in the animaladministered said test compound is an indication that said test compoundinhibits 3DG synthesis. Preferably, a test compound inhibits 3DGsynthesis by at least 20% compared to a control group which receives notest compound. More preferably, a test compound inhibits 3DG synthesisby at least 50%.

In another embodiment, the invention includes the identification ofcompounds which bind to 3DG or directly block its ability to cause theformation of advanced glycation end product modified proteins andcrosslinked proteins, such as those compounds comprising the structuralformulas I-XVIII.

In yet another embodiment, the invention includes the identification ofcompounds which inhibit a nonenzymatic pathway of 3DG synthesis.

In another embodiment of the invention, the invention includes theidentification of compounds which inhibit accumulation and function ofmembers of the alpha-dicarbonyl sugar family of compounds, includingglyoxal, methyl glyoxal and glucosone. In yet another aspect of theinvention, the invention includes the identification of compounds whichinhibit an enzymatic pathway of alpha-dicarbonyl sugar synthesis.

In general, methods for the identification of a compound which effectsthe synthesis, production, accumulation or function of 3DG (or otheralpha-dicarbonyl sugars), include the following general steps:

The test compound is administered to a cell, tissue, sample, or subject,in which the measurements are to be taken. A control is a cell, tissue,sample, or subject in which the test compound has not been added. Ahigher or lower level of the indicator or parameter being tested, i.e.,3DG levels, synthesis, function, degradation, etc., in the presence ofthe test compound, compared with the levels of the indicator orparameter in the sample which was not treated with the test compound, isan indication that the test compound has an effect on the indicator orparameter being measured, and as such, is a candidate for inhibition ofthe desired activity. Test compounds may be added at varying doses andfrequencies to determine the effective amount of the compound whichshould be used and effective intervals in which it should beadministered. In another aspect, a derivative or modification of thetest compound may be used.

In one aspect of the invention the 3DG function inhibitor inhibitsprotein crosslinking. In another aspect, the inhibitor inhibitsformation of advanced glycation end product modified proteins. In yetanother aspect, the 3DG function inhibitor comprises a structure of oneof structural formulas I-XIX or is arginine or a derivative ormodification thereof.

In one embodiment, the inhibitor comprises from about 0.0001% to about15% by weight of the pharmaceutical composition. In one aspect, theinhibitor is administered as a controlled-release formulation. Inanother aspect the pharmaceutical composition comprises a lotion, acream, a gel, a liniment, an ointment, a paste, a toothpaste, amouthwash, an oral rinse, a coating, a solution, a powder, and asuspension. In yet another aspect, the composition further comprises amoisturizer, a humectant, a demulcent, oil, water, an emulsifier, athickener, a thinner, a surface active agent, a fragrance, apreservative, an antioxidant, a hydrotropic agent, a chelating agent, avitamin, a mineral, a permeation enhancer, a cosmetic adjuvant, ableaching agent, a depigmentation agent, a foaming agent, a conditioner,a viscosifier, a buffering agent, and a sunscreen.

The invention should be construed to include various methods ofadministration, including topical, oral, intramuscular, and intravenous.

Assays for Testing Inhibition of 3DG and Other Alpha-dicarbonyl SugarSynthesis, Formation, Accumulation, and Function

The present disclosure provides a series of assays for identifyinginhibitors of 3DG synthesis, formation, accumulation, and function, aswell as measuring the effects of the various inhibitors on 3DGsynthesis, formation, accumulation, and function. The assays alsoinclude those used to measure 3DG degradation, detoxification, andclearance. The assays of the invention include, but are not limited to,HPLC assays, electrophoretic assays, gas chromatographic-massspectroscopic assays, amino acid analysis, enzyme activity assays,advanced glycation assays, protein crosslinking assays, NMR analysis,ion exchange chromatography, various chemical analyses, various labelingtechniques, surgical and gross dissection techniques, RNA isolation,RT-PCR, histologic techniques, various chemical, biochemical, andmolecular synthesis techniques, teratogenicity, mutagenicity, andcarcinogenicity assays, urine assays, excretion assays, and a variety ofanimal, tissue, blood, plasma, cell, biochemical, and moleculartechniques. Synthetic techniques may be used to produce compounds, suchas: chemical and enzymatic production of FL3P (Examples 1, 2 and 3);polyollysine (Example 4); 3-O-methylsorbitol lysine (Example 8);fructosyl spermine (Example 9); and glycated protein diet (Example 13).Other techniques may be used which are not described herein, but areknown to those of skill in the art.

In one embodiment of the invention, standards may be used when testingnew agents or compounds or when measuring the various parametersdescribed herein. For example, fructose-lysine is a known modulator of3DG and 3DF and it can be administered to a group or subject as astandard or control against which the effects of a test agent orcompound can be compared. In addition, when measuring a parameter,measurement of a standard can include measuring parameters such as 3DGor 3DF concentrations in a tissue or fluid obtained from a subjectbefore the subject is treated with a test compound and the sameparameters can be measured after treatment with the test compound. Inanother aspect of the invention, a standard can be an exogenously addedstandard which is an agent or compound that is added to a sample and isuseful as an internal control, especially where a sample is processedthrough several steps or procedures and the amount of recovery of amarker of interest at each step must be determined. Such exogenouslyadded internal standards are often added in a labeled form, i.e., aradioactive isotope.

Methods for Diagnosing 3DG Associated Skin Diseases or Disorders

The present invention discloses the presence of 3DG in skin and methodsfor measuring 3DG levels in the skin and for measuring an enzymeresponsible for 3DG synthesis in the skin (see Examples 19 and 20). Theinvention also encompasses methods which may be used to diagnose changesin 3DG levels in the skin which may be associated with wrinkling, aging,or various other skin diseases or disorders. The invention should not beconstrued to include only methods for diagnosing 3DG associated skindiseases and disorders, but should be construed to include methods fordiagnosing skin diseases and disorders associated with otheralpha-dicarbonyl sugars as well. The invention should also be construedto include methods for diagnosing 3DG associated diseases or disordersof other cells and tissues as well, including, but not limited to, gumdiseases and disorders.

In one embodiment of the invention, a patient with skin wrinkling, skinaging, or another skin disease or disorder, may be subjected to adiagnostic test to determine, for example, the levels of 3DG, thefunctional activity of 3DG, the levels of 3DF, a 3DF/3DG ratio, theamount of amadorase protein or mRNA present, or the levels of amadoraseactivity in their skin. Such a test is based on the various methods andassays described herein, or known to those of skill in the art. A higherlevel of 3DG or amadorase, or their activities, or lower levels of 3DF,compared to a non-affected area of skin or to skin of a normal patient,would be an indication that the skin wrinkling, skin aging, or otherskin disease or disorder, is associated with 3DG and that a 3DGinhibitor of the present invention would be an appropriate treatment forthe problem. The invention should also be construed to include skindiseases and disorders associated with molecules of the alpha-dicarbonylsugar family other than 3DG.

In one aspect of the invention, additional markers of 3DG associatedskin diseases or disorders can be measured, including, but not limitedto, measuring 3DF and FL levels, crosslinked protein levels, as well aslevels of other alpha-dicarbonyl sugars such as glyoxal, methyl glyoxal,and glucosone.

A multitude of assays for measuring 3DG levels and function, includingmeasuring its precursors, are described throughout the presentdisclosure (see Examples 1-22). However, the invention should not beconstrued to include only the assays described herein, but should beconstrued to include other assays to measure 3DG levels or function,including assays or techniques which are indirect measures of 3DG levelsor functional activity. For example, in one aspect of the invention,indirect measurement of 3DG levels and function can be determined bymeasuring such things as levels of 3DF, protein crosslinking,proteoglycan crosslinking, or any other assay shown to be correlative of3DG levels.

In one aspect of the invention, the sample to be used for measuring 3DGlevels, etc., is a skin sample. Skin samples may be obtained by methodswhich include, but are not limited to, punch biopsies, scraping, andblistering techniques.

In another aspect of the invention, indirect assays for 3DG levels orfunction in the skin which are correlative of 3DG associated skindiseases or disorders may be used. The assays may include, but are notlimited to, assays for measuring 3DG levels or function in othertissues, sweat, blood, plasma, saliva, or urine.

The invention discloses a method for diagnosing a 3DG or otheralpha-dicarbonyl sugar associated skin disease or disorder comprisingacquiring a biological sample from a test subject and comparing thelevel of 3DG or other alpha-dicarbonyl sugar associated parameter ofwrinkling, aging, disease, or disorder of the skin with the level of thesame parameter in an otherwise identical biological sample from acontrol subject. The control can be from an unaffected area of the samesubject or from a subject not affected by a 3DG or otheralpha-dicarbonyl sugar associated skin, disease or disorder. A higherlevel of the parameter in the test subject is an indication that thetest subject has a 3DG or other alpha-dicarbonyl sugar associatedwrinkling, aging, disease, or disorder of the skin. The parameters whichcan be measured are described herein or are known to those of skill inthe art, and include, but are not limited to, 3DG, protein crosslinking,proteoglycan crosslinking, advanced glycation end product modifiedproteins, 3DF, fructosamine kinase/amadorase levels and activity, andfructosamine kinase/amadorase mRNA.

In yet another aspect of the invention, 3DG or other alpha-dicarbonylsugars may be associated with skin diseases or disorders selected fromthe group comprising skin aging, photoaging, skin wrinkling, skincancer, hyperkeratosis, hyperplasia, acanthosis, papillomatosis,dermatosis, hyperpigmentation, rhinophyma, scleroderma, and rosacea. Inanother aspect of the invention, 3DG is associated with functionsincluding, but not limited to, protein crosslinking, mutagenicity,teratogenicity, apoptosis, oxidative damage caused by formation ofreactive oxygen species, and cytotoxicity. It is understood that 3DG andother alpha-dicarbonyl sugars are associated with functions causingdamage to not only proteins, but to lipids and DNA as well. In aspect ofthe invention, 3DG or other alpha-dicarbonyl sugars may also beassociated with diseases and disorders other than skin diseases,including, but not limited to, gum diseases and disorders.

In yet another aspect of the invention, the assays for measuring 3DGlevels and function may be used in conjunction with other methods formeasuring skin diseases and disorders, such as measuring the thicknessor elasticity of the skin. Many of these assays are described herein.One of skill in the art will appreciate that other assays not describedherein may be used in conjunction with the 3DG assays to form a completediagnosis of the type of skin problem involved and whether or not it isa 3DG associated skin problem.

The invention should not be construed to include diagnosing a skindisease, condition or disorder merely by measuring levels of thealpha-dicarbonyl sugar 3DG, it should also be construed to includemeasuring levels of other members of the alpha-dicarbonyl sugar familyas well.

Thus, the use of a diagnostic assay to determine an association between3DG and a skin disease or disorder will allow the selection ofappropriate subjects before initiating treatment with an inhibitor of3DG.

Methods for Inhibiting or Treating 3DG or Other Alpha-dicarbonyl SugarAssociated Skin Wrinkling, Skin Aging, or Other Skin Disease or Disorder

The invention also discloses methods for inhibiting or treating 3DGrelated skin diseases or disorders. Some examples of 3DG associateddiseases or disorders include, but are not limited to, skin cancer,psoriasis, aging, wrinkling, hyperkeratosis, hyperplasia, acanthosis,papillomatosis, dermatosis, rhinophyma, and rosacea. A cancer or otherdisease or disorder may belong to any of a group of cancers or otherdiseases or disorders, which have been described herein, as well as anyother related cancer or other disease or disorder known to those ofskill in the art.

The invention should not be construed as being limited solely to theseexamples, as other 3DG associated diseases or disorders which are atpresent unknown, once known, may also be treatable using the methods ofthe invention. One of skill in the art would appreciate that 3DGinhibitors may be used prophylactically for some diseases or disordersof the skin, wherein 3DG is known, or it becomes known, that 3DG isassociated with a skin disease or disorder. For example, 3DG inhibitorsmay be applied to prevent wrinkling or other skin problems in subjectswho are exposed to harsh environmental elements such as the sun(photoaging/photodamage), heat, chemicals, or cold. Such problems can bedue to damage to proteins or other molecules such as lipids or nucleicacids caused by 3DG or alpha-dicarbonyl sugars.

The invention also includes methods for inhibiting or treating skindiseases or disorders associated with members of the alpha-dicarbonylsugar family of compounds other than 3DG.

In one aspect of the invention, various changes in the skin can bemeasured following treatment with inhibitors of 3DG. The skin topographycan be defined by parameters such as: (a) number of wrinkles; (b) totalarea of wrinkles; (c) total length of wrinkles; (d) mean length ofwrinkles; and (e) mean depth of wrinkles. The type of wrinkles can bedetermined on the basis of depth, length, and area. These properties canbe used when evaluating the changes in skin due to disease or disorderor the effects of a treatment on the skin. The effects of changes in 3DGlevels and function on various skin qualities can be determined based ontechniques known in the art. Methods to measure skin quality include,but are not limited to, measuring viscoelastic properties withinstruments such as a ballistometer, measuring the mechanical/verticaldeformation properties of the skin with an instrument such as acutometer, or measuring changes in skin capacitance resulting fromchanges in the degree of hydration using a corneometer.

The invention relates to the administration of an identified compound ina pharmaceutical composition to practice the methods of the invention,the composition comprising the compound or an appropriate derivative orfragment of the compound and a pharmaceutically-acceptable carrier. Forexample, a chemical composition with which an appropriate inhibitor ofenzyme dependent or nonenzyme dependent production of 3DG, or inhibitorof 3DG accumulation or function, or stimulator of 3DG removal,detoxification, or degradation, is combined, is used to administer theappropriate compound to an animal. The invention should be construed toinclude the use of one, or simultaneous use of more than one, inhibitorof 3DG or stimulator of 3DG removal, degradation, or detoxification.When more than one stimulator or inhibitor is used, they can beadministered together or they can be administered separately.

In one embodiment, the pharmaceutical compositions useful for practicingthe invention may be administered to deliver a dose of between 1ng/kg/day and 100 mg/kg/day. In another embodiment, the pharmaceuticalcompositions useful for practicing the invention may be administered todeliver a dose of between 1 ng/kg/day and 100 g/kg/day.

Pharmaceutically acceptable carriers which are useful include, but arenot limited to, glycerol, water, saline, ethanol and otherpharmaceutically acceptable salt solutions such as phosphates and saltsof organic acids. Examples of these and other pharmaceuticallyacceptable carriers are described in Remington's Pharmaceutical Sciences(1991, Mack Publication Co., New Jersey).

The pharmaceutical compositions may be prepared, packaged, or sold inthe form of a sterile injectable aqueous or oily suspension or solution.This suspension or solution may be formulated according to the knownart, and may comprise, in addition to the active ingredient, additionalingredients such as the dispersing agents, wetting agents, or suspendingagents described herein. Such sterile injectable formulations may beprepared using a non-toxic parenterally-acceptable diluent or solvent,such as water or 1,3-butane diol, for example. Other acceptable diluentsand solvents include, but are not limited to, Ringer's solution,isotonic sodium chloride solution, and fixed oils such as syntheticmono- or di-glycerides.

Pharmaceutical compositions that are useful in the methods of theinvention may be administered, prepared, packaged, and/or sold informulations suitable for oral, rectal, vaginal, parenteral, topical,pulmonary, intranasal, buccal, ophthalmic, or another route ofadministration. Other contemplated formulations include projectednanoparticles, liposomal preparations, resealed erythrocytes containingthe active ingredient, and immunologically-based formulations.

The compositions of the invention may be administered via numerousroutes, including, but not limited to, oral, rectal, vaginal,parenteral, topical, pulmonary, intranasal, buccal, or ophthalmicadministration routes. The route(s) of administration will be readilyapparent to the skilled artisan and will depend upon any number offactors including the type and severity of the disease being treated,the type and age of the veterinary or human patient being treated, andthe like.

Pharmaceutical compositions that are useful in the methods of theinvention may be administered systemically in oral solid formulations,ophthalmic, suppository, aerosol, topical or other similar formulations.In addition to the compound such as heparan sulfate, or a biologicalequivalent thereof, such pharmaceutical compositions may containpharmaceutically-acceptable carriers and other ingredients known toenhance and facilitate drug administration. Other possible formulations,such as nanoparticles, liposomes, resealed erythrocytes, andimmunologically based systems may also be used to administer compoundsaccording to the methods of the invention.

Compounds which are identified using any of the methods described hereinmay be formulated and administered to a mammal for treatment of skinaging, skin wrinkling, and various skin related diseases, disorders, orconditions described herein.

The invention encompasses the preparation and use of pharmaceuticalcompositions comprising a compound useful for treatment of various skinrelated diseases, disorders, or conditions described herein, includingskin aging, photoaging, and wrinkling of the skin. The invention alsoencompasses 3DG associated diseases and disorders other than those ofthe skin, including, but not limited to, gum diseases and disorders.Such a pharmaceutical composition may consist of the active ingredientalone, in a form suitable for administration to a subject, or thepharmaceutical composition may comprise at least one active ingredientand one or more pharmaceutically acceptable carriers, one or moreadditional ingredients, or some combination of these. The activeingredient may be present in the pharmaceutical composition in the formof a physiologically acceptable ester or salt, such as in combinationwith a physiologically acceptable cation or anion, as is well known inthe art.

An obstacle for topical administration of pharmaceuticals is the stratumcorneum layer of the epidermis. The stratum corneum is a highlyresistant layer comprised of protein, cholesterol, sphingolipids, freefatty acids and various other lipids, and includes cornified and livingcells. One of the factors that limits the penetration rate (flux) of acompound through the stratum corneum is the amount of the activesubstance which can be loaded or applied onto the skin surface. Thegreater the amount of active substance which is applied per unit of areaof the skin, the greater the concentration gradient between the skinsurface and the lower layers of the skin, and in turn the greater thediffusion force of the active substance through the skin. Therefore, aformulation containing a greater concentration of the active substanceis more likely to result in penetration of the active substance throughthe skin, and more of it, and at a more consistent rate, than aformulation having a lesser concentration, all other things being equal.

The formulations of the pharmaceutical compositions described herein maybe prepared by any method known or hereafter developed in the art ofpharmacology. In general, such preparatory methods include the step ofbringing the active ingredient into association with a carrier or one ormore other accessory ingredients, and then, if necessary or desirable,shaping or packaging the product into a desired single- or multi-doseunit.

Although the descriptions of pharmaceutical compositions provided hereinare principally directed to pharmaceutical compositions which aresuitable for ethical administration to humans, it will be understood bythe skilled artisan that such compositions are generally suitable foradministration to animals of all sorts.

Modification of pharmaceutical compositions suitable for administrationto humans in order to render the compositions suitable foradministration to various animals is well understood, and the ordinarilyskilled veterinary pharmacologist can design and perform suchmodification with merely ordinary, if any, experimentation. Subjects towhich administration of the pharmaceutical compositions of the inventionis contemplated include, but are not limited to, humans and otherprimates, mammals including commercially relevant mammals such ascattle, pigs, horses, sheep, cats, and dogs.

Pharmaceutical compositions that are useful in the methods of theinvention may be prepared, packaged, or sold in formulations suitablefor oral, rectal, vaginal, parenteral, topical, pulmonary, intranasal,buccal, ophthalmic, intrathecal or another route of administration.Other contemplated formulations include projected nanoparticles,liposomal preparations, resealed erythrocytes containing the activeingredient, and immunologically-based formulations.

A pharmaceutical composition of the invention may be prepared, packaged,or sold in bulk, as a single unit dose, or as a plurality of single unitdoses. As used herein, a “unit dose” is a discrete amount of thepharmaceutical composition comprising a predetermined amount of theactive ingredient. The amount of the active ingredient is generallyequal to the dosage of the active ingredient which would be administeredto a subject or a convenient fraction of such a dosage such as, forexample, one-half or one-third of such a dosage.

The relative amounts of the active ingredient, the pharmaceuticallyacceptable carrier, and any additional ingredients in a pharmaceuticalcomposition of the invention will vary, depending upon the identity,size, and condition of the subject treated and further depending uponthe route by which the composition is to be administered. By way ofexample, the composition may comprise between 0.1% and 100% (w/w) activeingredient.

In addition to the active ingredient, a pharmaceutical composition ofthe invention may further comprise one or more additionalpharmaceutically active agents. Particularly contemplated additionalagents include anti-emetics and scavengers such as cyanide and cyanatescavengers.

Controlled- or sustained-release formulations of a pharmaceuticalcomposition of the invention may be made using conventional technology.

Formulations suitable for topical administration include, but are notlimited to, liquid or semi-liquid preparations such as liniments,lotions, oil-in-water or water-in-oil emulsions such as creams,ointments or pastes, and solutions or suspensions.Topically-administrable formulations may, for example, comprise fromabout 1% to about 10% (w/w) active ingredient, although theconcentration of the active ingredient may be as high as the solubilitylimit of the active ingredient in the solvent. Formulations for topicaladministration may further comprise one or more of the additionalingredients described herein.

Enhancers of permeation may be used. These materials increase the rateof penetration of drugs across the skin. Typical enhancers in the artinclude ethanol, glycerol monolaurate, PGML (polyethylene glycolmonolaurate), dimethylsulfoxide, and the like. Other enhancers includeoleic acid, oleyl alcohol, ethoxydiglycol, laurocapram, alkanecarboxylicacids, dimethylsulfoxide, polar lipids, or N-methyl-2-pyrrolidone.

One acceptable vehicle for topical delivery of some of the compositionsof the invention may contain liposomes. The composition of the liposomesand their use are known in the art (for example, see Constanza, U.S.Pat. No. 6,323,219).

The source of active compound to be formulated will generally dependupon the particular form of the compound. Small organic molecules andpeptidyl or oligo fragments can be chemically synthesized and providedin a pure form suitable for pharmaceutical/cosmetic usage. Products ofnatural extracts can be purified according to techniques known in theart. Recombinant sources of compounds are also available to those ofordinary skill in the art.

In alternative embodiments, the topically active pharmaceutical orcosmetic composition may be optionally combined with other ingredientssuch as moisturizers, cosmetic adjuvants, anti-oxidants, chelatingagents, bleaching agents, tyrosinase inhibitors and other knowndepigmentation agents, surfactants, foaming agents, conditioners,humectants, wetting agents, emulsifying agents, fragrances,viscosifiers, buffering agents, preservatives, sunscreens and the like.In another embodiment, a permeation or penetration enhancer is includedin the composition and is effective in improving the percutaneouspenetration of the active ingredient into and through the stratumcorneum with respect to a composition lacking the permeation enhancer.Various permeation enhancers, including oleic acid, oleyl alcohol,ethoxydiglycol, laurocapram, alkanecarboxylic acids, dimethylsulfoxide,polar lipids, or N-methyl-2-pyrrolidone, are known to those of skill inthe art. In another aspect, the composition may further comprise ahydrotropic agent, which functions to increase disorder in the structureof the stratum corneum, and thus allows increased transport across thestratum corneum. Various hydrotropic agents such as isopropyl alcohol,propylene glycol, or sodium xylene sulfonate, are known to those ofskill in the art. The compositions of this invention may also containactive amounts of retinoids (i.e., compounds that bind to any members ofthe family of retinoid receptors), including, for example, tretinoin,retinol, esters of tretinoin and/or retinol and the like.

The topically active pharmaceutical or cosmetic composition should beapplied in an amount effective to affect desired changes. As used herein“amount effective” shall mean an amount sufficient to cover the regionof skin surface where a change is desired. An active compound should bepresent in the amount of from about 0.0001% to about 15% by weightvolume of the composition. More preferable, it should be present in anamount from about 0.0005% to about 5% of the composition; mostpreferably, it should be present in an amount of from about 0.001% toabout 1% of the composition. Such compounds may be synthetically- ornaturally-derived.

Liquid derivatives and natural extracts made directly from biologicalsources may be employed in the compositions of this invention in aconcentration (w/v) from about 1 to about 99%. Fractions of naturalextracts and protease inhibitors may have a different preferred rage,from about 0.01% to about 20% and, more preferably, from about 1% toabout 10% of the composition. Of course, mixtures of the active agentsof this invention may be combined and used together in the sameformulation, or in serial applications of different formulations.

The composition of the invention may comprise a preservative from about0.005% to 2.0% by total weight of the composition. The preservative isused to prevent spoilage in the case of an aqueous gel because ofrepeated patient use when it is exposed to contaminants in theenvironment from, for example, exposure to air or the patient's skin,including contact with the fingers used for applying a composition ofthe invention such as a therapeutic gel or cream. Examples ofpreservatives useful in accordance with the invention included but arenot limited to those selected from the group consisting of benzylalcohol, sorbic acid, parabens, imidurea and combinations thereof. Aparticularly preferred preservative is a combination of about 0.5% to2.0% benzyl alcohol and 0.05% to 0.5% sorbic acid.

The composition preferably includes an antioxidant and a chelating agentwhich inhibit the degradation of the compound for use in the inventionin the aqueous gel formulation. Preferred antioxidants for somecompounds are BHT, BHA, alphatocopherol and ascorbic acid in thepreferred range of about 0.01% to 0.3% and more preferably BHT in therange of 0.03% to 0.1% by weight by total weight of the composition.Preferably, the chelating agent is present in an amount of from 0.01% to0.5% by weight by total weight of the composition. Particularlypreferred chelating agents include edetate salts (e.g. disodium edetate)and citric acid in the weight range of about 0.01% to 0.20% and morepreferably in the range of 0.02% to 0.10% by weight by total weight ofthe composition. The chelating agent is useful for chelating metal ionsin the composition which may be detrimental to the shelf life of theformulation. While BHT and disodium edetate are the particularlypreferred antioxidant and chelating agent respectively for somecompounds, other suitable and equivalent antioxidants and chelatingagents may be substituted therefor as would be known to those skilled inthe art.

Controlled-release preparations may also be used and the methods for theuse of such preparations are known to those of skill in the art.

In some cases, the dosage forms to be used can be provided as slow orcontrolled-release of one or more active ingredients therein using, forexample, hydropropylmethyl cellulose, other polymer matrices, gels,permeable membranes, osmotic systems, multilayer coatings,microparticles, liposomes, or microspheres or a combination thereof toprovide the desired release profile in varying proportions. Suitablecontrolled-release formulations known to those of ordinary skill in theart, including those described herein, can be readily selected for usewith the pharmaceutical compositions of the invention. Thus, single unitdosage forms suitable for oral administration, such as tablets,capsules, gelcaps, and caplets, that are adapted for controlled-releaseare encompassed by the present invention.

All controlled-release pharmaceutical products have a common goal ofimproving drug therapy over that achieved by their non-controlledcounterparts. Ideally, the use of an optimally designedcontrolled-release preparation in medical treatment is characterized bya minimum of drug substance being employed to cure or control thecondition in a minimum amount of time. Advantages of controlled-releaseformulations include extended activity of the drug, reduced dosagefrequency, and increased patient compliance. In addition,controlled-release formulations can be used to affect the time of onsetof action or other characteristics, such as blood level of the drug, andthus can affect the occurrence of side effects.

Most controlled-release formulations are designed to initially releasean amount of drug that promptly produces the desired therapeutic effect,and gradually and continually release of other amounts of drug tomaintain this level of therapeutic effect over an extended period oftime. In order to maintain this constant level of drug in the body, thedrug must be released from the dosage form at a rate that will replacethe amount of drug being metabolized and excreted from the body.

Controlled-release of an active ingredient can be stimulated by variousinducers, for example pH, temperature, enzymes, water, or otherphysiological conditions or compounds. The term “controlled-releasecomponent” in the context of the present invention is defined herein asa compound or compounds, including, but not limited to, polymers,polymer matrices, gels, permeable membranes, liposomes, or microspheresor a combination thereof that facilitates the controlled-release of theactive ingredient.

Liquid suspensions may be prepared using conventional methods to achievesuspension of the active ingredient in an aqueous or oily vehicle.Aqueous vehicles include, for example, water, and isotonic saline. Oilyvehicles include, for example, almond oil, oily esters, ethyl alcohol,vegetable oils such as arachis, olive, sesame, or coconut oil,fractionated vegetable oils, and mineral oils such as liquid paraffin.Liquid suspensions may further comprise one or more additionalingredients including, but not limited to, suspending agents, dispersingor wetting agents, emulsifying agents, demulcents, preservatives,buffers, salts, flavorings, coloring agents, and sweetening agents. Oilysuspensions may further comprise a thickening agent. Known suspendingagents include, but are not limited to, sorbitol syrup, hydrogenatededible fats, sodium alginate, polyvinylpyrrolidone, gum tragacanth, gumacacia, and cellulose derivatives such as sodium carboxymethylcellulose,methylcellulose, hydroxypropylmethylcellulose. Known dispersing orwetting agents include, but are not limited to, naturally-occurringphosphatides such as lecithin, condensation products of an alkyleneoxide with a fatty acid, with a long chain aliphatic alcohol, with apartial ester derived from a fatty acid and a hexitol, or with a partialester derived from a fatty acid and a hexitol anhydride (e.g.,polyoxyethylene stearate, heptadecaethyleneoxycetanol, polyoxyethylenesorbitol monooleate, and polyoxyethylene sorbitan monooleate,respectively). Known emulsifying agents include, but are not limited to,lecithin, and acacia. Known preservatives include, but are not limitedto, methyl, ethyl, or n-propyl-para-hydroxybenzoates, ascorbic acid, andsorbic acid. Known sweetening agents include, for example, glycerol,propylene glycol, sorbitol, sucrose, and saccharin. Known thickeningagents for oily suspensions include, for example, beeswax, hardparaffin, and cetyl alcohol.

Liquid solutions of the active ingredient in aqueous or oily solventsmay be prepared in substantially the same manner as liquid suspensions,the primary difference being that the active ingredient is dissolved,rather than suspended in the solvent. Liquid solutions of thepharmaceutical composition of the invention may comprise each of thecomponents described with regard to liquid suspensions, it beingunderstood that suspending agents will not necessarily aid dissolutionof the active ingredient in the solvent. Aqueous solvents include, forexample, water, and isotonic saline. Oily solvents include, for example,almond oil, oily esters, ethyl alcohol, vegetable oils such as arachis,olive, sesame, or coconut oil, fractionated vegetable oils, and mineraloils such as liquid paraffin.

Powdered and granular formulations of a pharmaceutical preparation ofthe invention may be prepared using known methods. Such formulations maybe administered directly to a subject, used, for example, to formtablets, to fill capsules, or to prepare an aqueous or oily suspensionor solution by addition of an aqueous or oily vehicle thereto. Each ofthese formulations may further comprise one or more of dispersing orwetting agent, a suspending agent, and a preservative. Additionalexcipients, such as fillers and sweetening, flavoring, or coloringagents, may also be included in these formulations.

A pharmaceutical composition of the invention may also be prepared,packaged, or sold in the form of oil-in-water emulsion or a water-in-oilemulsion. The oily phase may be a vegetable oil such as olive or arachisoil, a mineral oil such as liquid paraffin, or a combination of these.Such compositions may further comprise one or more emulsifying agentssuch as naturally occurring gums such as gum acacia or gum tragacanth,naturally-occurring phosphatides such as soybean or lecithinphosphatide, esters or partial esters derived from combinations of fattyacids and hexitol anhydrides such as sorbitan monooleate, andcondensation products of such partial esters with ethylene oxide such aspolyoxyethylene sorbitan monooleate. These emulsions may also containadditional ingredients including, for example, sweetening or flavoringagents.

As used herein, an “oily” liquid is one which comprises acarbon-containing liquid molecule and which exhibits a less polarcharacter than water.

A formulation of a pharmaceutical composition of the invention suitablefor oral administration may be prepared, packaged, or sold in the formof a discrete solid dose unit including, but not limited to, a tablet, ahard or soft capsule, a cachet, a troche, or a lozenge, each containinga predetermined amount of the active ingredient. Other formulationssuitable for oral administration include, but are not limited to, apowdered or granular formulation, an aqueous or oily suspension, anaqueous or oily solution, a paste, a gel, a toothpaste, a mouthwash, acoating, an oral rinse, or an emulsion. The terms oral rinse andmouthwash are used interchangeably herein.

A pharmaceutical composition of the invention may be prepared, packaged,or sold in a formulation suitable for oral or buccal administration.Such a formulation may comprise, but is not limited to, a gel, a liquid,a suspension, a paste, a toothpaste, a mouthwash or oral rinse, and acoating. For example, an oral rinse of the invention may comprise acompound of the invention at about 1.4%, chlorhexidine gluconate(0.12%), ethanol (11.2%), sodium saccharin (0.15%), FD&C Blue No. 1(0.001%), peppermint oil (0.5%), glycerine (10.0%), Tween 60 (0.3%), andwater to 100%. In another embodiment, a toothpaste of the invention maycomprise a compound of the invention at about 5.5%, sorbitol, 70% inwater (25.0%), sodium saccharin (0.15%), sodium lauryl sulfate (1.75%),carbopol 934, 6% dispersion in (15%), oil of spearmint (1.0%), sodiumhydroxide, 50% in water (0.76%), dibasic calcium phosphate dihydrate(45%), and water to 100%. The examples of formulations described hereinare not exhaustive and it is understood that the invention includesadditional modifications of these and other formulations not describedherein, but which are known to those of skill in the art.

A tablet comprising the active ingredient may, for example, be made bycompressing or molding the active ingredient, optionally with one ormore additional ingredients. Compressed tablets may be prepared bycompressing, in a suitable device, the active ingredient in afree-flowing form such as a powder or granular preparation, optionallymixed with one or more of a binder, a lubricant, an excipient, a surfaceactive agent, and a dispersing agent. Molded tablets may be made bymolding, in a suitable device, a mixture of the active ingredient, apharmaceutically acceptable carrier, and at least sufficient liquid tomoisten the mixture. Pharmaceutically acceptable excipients used in themanufacture of tablets include, but are not limited to, inert diluents,granulating and disintegrating agents, binding agents, and lubricatingagents. Known dispersing agents include, but are not limited to, potatostarch and sodium starch glycollate. Known surface-active agentsinclude, but are not limited to, sodium lauryl sulphate. Known diluentsinclude, but are not limited to, calcium carbonate, sodium carbonate,lactose, microcrystalline cellulose, calcium phosphate, calcium hydrogenphosphate, and sodium phosphate. Known granulating and disintegratingagents include, but are not limited to, corn starch and alginic acid.Known binding agents include, but are not limited to, gelatin, acacia,pre-gelatinized maize starch, polyvinylpyrrolidone, and hydroxypropylmethylcellulose. Known lubricating agents include, but are not limitedto, magnesium stearate, stearic acid, silica, and talc.

Tablets may be non-coated or they may be coated using known methods toachieve delayed disintegration in the gastrointestinal tract of asubject, thereby providing sustained release and absorption of theactive ingredient. By way of example, a material such as glycerylmonostearate or glyceryl distearate may be used to coat tablets. Furtherby way of example, tablets may be coated using methods described in U.S.Pat. Nos. 4,256,108; 4,160,452; and 4,265,874 to formosmotically-controlled release tablets. Tablets may further comprise asweetening agent, a flavoring agent, a coloring agent, a preservative,or some combination of these in order to provide for pharmaceuticallyelegant and palatable preparation.

Hard capsules comprising the active ingredient may be made using aphysiologically degradable composition, such as gelatin. Such hardcapsules comprise the active ingredient, and may further compriseadditional ingredients including, for example, an inert solid diluentsuch as calcium carbonate, calcium phosphate, or kaolin.

Soft gelatin capsules comprising the active ingredient may be made usinga physiologically degradable composition, such as gelatin. Such softcapsules comprise the active ingredient, which may be mixed with wateror an oil medium such as peanut oil, liquid paraffin, or olive oil.

Liquid formulations of a pharmaceutical composition of the inventionwhich are suitable for oral administration may be prepared, packaged,and sold either in liquid form or in the form of a dry product intendedfor reconstitution with water or another suitable vehicle prior to use.

A pharmaceutical composition of the invention may be prepared, packaged,or sold in a formulation suitable for rectal administration. Such acomposition may be in the form of, for example, a suppository, aretention enema preparation, and a solution for rectal or colonicirrigation.

Suppository formulations may be made by combining the active ingredientwith a non-irritating pharmaceutically acceptable excipient which issolid at ordinary room temperature (i.e., about 20° C.) and which isliquid at the rectal temperature of the subject (i.e., about 37° C. in ahealthy human). Suitable pharmaceutically acceptable excipients include,but are not limited to, cocoa butter, polyethylene glycols, and variousglycerides. Suppository formulations may further comprise variousadditional ingredients including, but not limited to, antioxidants, andpreservatives.

Retention enema preparations or solutions for rectal or colonicirrigation may be made by combining the active ingredient with apharmaceutically acceptable liquid carrier. As is well known in the art,enema preparations may be administered using, and may be packagedwithin, a delivery device adapted to the rectal anatomy of the subject.Enema preparations may further comprise various additional ingredientsincluding, but not limited to, antioxidants, and preservatives.

A pharmaceutical composition of the invention may be prepared, packaged,or sold in a formulation suitable for vaginal administration. Such acomposition may be in the form of, for example, a suppository, animpregnated or coated vaginally-insertable material such as a tampon, adouche preparation, or gel or cream or a solution for vaginalirrigation.

Methods for impregnating or coating a material with a chemicalcomposition are known in the art, and include, but are not limited tomethods of depositing or binding a chemical composition onto a surface,methods of incorporating a chemical composition into the structure of amaterial during the synthesis of the material (i.e., such as with aphysiologically degradable material), and methods of absorbing anaqueous or oily solution or suspension into an absorbent material, withor without subsequent drying.

Douche preparations or solutions for vaginal irrigation may be made bycombining the active ingredient with a pharmaceutically acceptableliquid carrier. As is well known in the art, douche preparations may beadministered using, and may be packaged within, a delivery deviceadapted to the vaginal anatomy of the subject.

Douche preparations may further comprise various additional ingredientsincluding, but not limited to, antioxidants, antibiotics, antifungalagents, and preservatives. As used herein, “parenteral administration”of a pharmaceutical composition includes any route of administrationcharacterized by physical breaching of a tissue of a subject andadministration of the pharmaceutical composition through the breach inthe tissue. Parenteral administration thus includes, but is not limitedto, administration of a pharmaceutical composition by injection of thecomposition, by application of the composition through a surgicalincision, by application of the composition through a tissue-penetratingnon-surgical wound, and the like. In particular, parenteraladministration is contemplated to include, but is not limited to,subcutaneous, intraperitoneal, intramuscular, intrasternal injection,and kidney dialytic infusion techniques.

Formulations of a pharmaceutical composition suitable for parenteraladministration comprise the active ingredient combined with apharmaceutically acceptable carrier, such as sterile water or sterileisotonic saline. Such formulations may be prepared, packaged, or sold ina form suitable for bolus administration or for continuousadministration. Injectable formulations may be prepared, packaged, orsold in unit dosage form, such as in ampules or in multi-dose containerscontaining a preservative. Formulations for parenteral administrationinclude, but are not limited to, suspensions, solutions, emulsions inoily or aqueous vehicles, pastes, and implantable sustained-release orbiodegradable formulations. Such formulations may further comprise oneor more additional ingredients including, but not limited to,suspending, stabilizing, or dispersing agents. In one embodiment of aformulation for parenteral administration, the active ingredient isprovided in dry (i.e., powder or granular) form for reconstitution witha suitable vehicle (e.g., sterile pyrogen-free water) prior toparenteral administration of the reconstituted composition.

The pharmaceutical compositions may be prepared, packaged, or sold inthe form of a sterile injectable aqueous or oily suspension or solution.This suspension or solution may be formulated according to the knownart, and may comprise, in addition to the active ingredient, additionalingredients such as the dispersing agents, wetting agents, or suspendingagents described herein. Such sterile injectable formulations may beprepared using a non-toxic parenterally-acceptable diluent or solvent,such as water or 1,3-butane diol, for example. Other acceptable diluentsand solvents include, but are not limited to, Ringer's solution,isotonic sodium chloride solution, and fixed oils such as syntheticmono- or di-glycerides. Other parentally-administrable formulationswhich are useful include those which comprise the active ingredient inmicrocrystalline form, in a liposomal preparation, or as a component ofa biodegradable polymer system. Compositions for sustained release orimplantation may comprise pharmaceutically acceptable polymeric orhydrophobic materials such as an emulsion, an ion exchange resin, asparingly soluble polymer, or a sparingly soluble salt.

A pharmaceutical composition of the invention may be prepared, packaged,or sold in a formulation suitable for buccal administration. Suchformulations may, for example, be in the form of tablets or lozengesmade using conventional methods, and may, for example, 0.1 to 20% (w/w)active ingredient, the balance comprising an orally dissolvable ordegradable composition and, optionally, one or more of the additionalingredients described herein. Alternately, formulations suitable forbuccal administration may comprise a powder or an aerosolized oratomized solution or suspension comprising the active ingredient. Suchpowdered, aerosolized, or aerosolized formulations, when dispersed,preferably have an average particle or droplet size in the range fromabout 0.1 to about 200 nanometers, and may further comprise one or moreof the additional ingredients described herein.

As used herein, “additional ingredients” include, but are not limitedto, one or more of the following: excipients; surface active agents;dispersing agents; inert diluents; granulating and disintegratingagents; binding agents; lubricating agents; sweetening agents; flavoringagents; coloring agents; preservatives; physiologically degradablecompositions such as gelatin; aqueous vehicles and solvents; oilyvehicles and solvents; suspending agents; dispersing or wetting agents;emulsifying agents, demulcents; buffers; salts; thickening agents;fillers; emulsifying agents; antioxidants; antibiotics; antifungalagents; stabilizing agents; and pharmaceutically acceptable polymeric orhydrophobic materials. Other “additional ingredients” which may beincluded in the pharmaceutical compositions of the invention are knownin the art and described, for example in Genaro, ed. (1985, Remington'sPharmaceutical Sciences, Mack Publishing Co., Easton, Pa.), which isincorporated herein by reference.

Typically, dosages of the compound of the invention which may beadministered to an animal, preferably a human, will vary depending uponany number of factors, including but not limited to, the type of animaland type of disease state being treated, the age of the animal and theroute of administration.

The compound can be administered to an animal as frequently as severaltimes daily, or it may be administered less frequently, such as once aday, once a week, once every two weeks, once a month, or even leesfrequently, such as once every several months or even once a year orless. The frequency of the dose will be readily apparent to the skilledartisan and will depend upon any number of factors, such as, but notlimited to, the type and severity of the disease being treated, the typeand age of the animal, etc.

It will be recognized by one of skill in the art that the variousembodiments of the invention as described above relating to methods ofinhibiting 3DG or treating 3DG related diseases or conditions, includesother diseases and conditions not described herein.

Kits

The present invention should be construed to include kits for inhibitingor stimulating 3DG, treating 3DG associated skin diseases and disorders,kits for measuring 3DG and 3DG related parameters, and kits fordiagnosing 3DG associated skin diseases and disorders. The inventionshould be construed to include kits for alpha-dicarbonyl sugars otherthan 3DG as well.

The invention includes a kit comprising an inhibitor of 3DG or acompound identified in the invention, a standard, and an instructionalmaterial which describes administering the inhibitor or a compositioncomprising the inhibitor or compound to a cell or an animal. This shouldbe construed to include other embodiments of kits that are known tothose skilled in the art, such as a kit comprising a standard and a(preferably sterile) solvent suitable for dissolving or suspending thecomposition of the invention prior to administering the compound to acell or an animal. Preferably the animal is a mammal. More preferably,the mammal is a human.

The invention also includes a kit comprising a stimulator of 3DGdegradation, detoxification, or clearance, or a such a stimulatorycompound identified in the invention, a standard, and an instructionalmaterial which describes administering the stimulator or a compositioncomprising the stimulator or compound to a cell or an animal. Thisshould be construed to include other embodiments of kits that are knownto those skilled in the art, such as a kit comprising a standard and a(preferably sterile) solvent suitable for dissolving or suspending thecomposition of the invention prior to administering the compound to acell or an animal.

In accordance with the present invention, as described above or asdiscussed in the Examples below, there can be employed conventionalchemical, cellular, histochemical, biochemical, molecular biology,microbiology and recombinant DNA techniques which are known to those ofskill in the art. Such techniques are explained fully in the literature.See for example, Sambrook et al., 1989 Molecular Cloning—a LaboratoryManual, Cold Spring Harbor Press; Glover, (1985) DNA Cloning: aPractical Approach; Gait, (1984) Oligonucleotide Synthesis; Harlow etal., 1988 Antibodies—a Laboratory Manual, Cold Spring Harbor Press; Roeet al., 1996 DNA Isolation and Sequencing: Essential Techniques, JohnWiley; and Ausubel et al., 1995 Current Protocols in Molecular Biology,Greene Publishing.

Without further description, it is believed that one of ordinary skillin the art can, using the preceding description and the followingillustrative examples, make and utilize the compounds of the presentinvention and practice the claimed methods. The following workingexamples therefore, specifically point out the preferred embodiments ofthe present invention, and are not to be construed as limiting in anyway the remainder of the disclosure.

EXPERIMENTAL EXAMPLES

The invention is now described with reference to the following Examples.These Examples are provided for the purpose of illustration only and theinvention should in no way be construed as being limited to theseExamples, but rather should be construed to encompass any and allvariations which become evident as a result of the teaching providedherein.

Example 1 Isolation and Identification of FL3P

The following assays were performed in order to verify thatfructoselysine (FL) could be identified in its phosphorylated state,e.g., FL3P. A ³¹P NMR analysis of a perchloric acid extract of diabeticrat kidneys was performed and showed a new sugar monophosphate resonanceat 6.24 ppm which is not observed in non-kidney tissue and is present atgreatly reduced levels in non-diabetic kidney. The compound responsiblefor the observed resonance was isolated by chromatography of the extracton a microcrystalline cellulose column using 1-butanol-acetic acid-water(5:2:3) as eluent. The structure was determined by proton 2D COSY to befructose-lysine 3-phosphate. This was later confirmed by injectinganimals with FL, prepared as previously described (Finot and Mauson,1969, Helv. Chim. Acta, 52:1488), and showing direct phosphorylation toFL3P.

Using FL specifically deuterated in position-3 confirmed the position ofthe phosphate at carbon-3. This was performed by analyzing the ³¹P NMRspectra, both coupled and decoupled. The normal P—O—C—H couplingproduces a doublet in FL3P with a J value of 10.3 Hz; whereas P—O—C-Dhas no coupling and produces a singlet both coupled and decoupled, aswas found for 3-deuterated FL3P. A unique property of FL3P is that whentreated with sodium borohydride it is converted into two new resonancesat 5.85 and 5.95 ppm, which correspond to mannitol and sorbitol-lysine3-phosphates.

Example 2 Synthesis of FL3P

1 mmol of dibenzyl-glucose 3-phosphate and 0.25 mmol ofα-carbobenzoxy-lysine was refluxed in 50 ml of MeOH for 3 hours. Thesolution was diluted with 100 ml water and chromatographed on a Dow-50column (2.5×20 cm) in the pyridinium form and eluted first with water(200 ml) and then with 600 ml buffer (0.1M pyridine and 0.3M aceticacid). The target compound eluted at the end of the water wash and thebeginning of the buffer wash. The results demonstrated that removal ofthe cbz and benzyl blocking groups with 5% Pd/C at 20 psi of hydrogengave FL3P in 6% yield.

Example 3 Enzymatic Production of FL3P from FL and ATP and Assay forScreening Inhibitors

Initially ³¹P NMR was used to demonstrate kinase activity in the kidneycortex. A 3 g sample of fresh pig kidney cortex was homogenized in 9 mlof 50 mM Tris.HCl containing 150 mM KCl, 5 mM DTT, 15 mM MgCl₂, pH 7.5.This was centrifuged at 10,000 g for 30 minutes, and then thesupernatant was centrifuged at 100,000 g for 60 minutes. Ammoniumsulfate was added to 60% saturation. After 1 hour at 4° C. theprecipitate was collected by centrifugation and dissolved in 5 ml. oforiginal buffer. A 2 ml aliquot of this solution was incubated with 10mM ATP and 10 mM of FL (prepared as in Example 1, above) for 2 hours at37° C. The reaction was quenched with 300 μl of perchloric acid,centrifuged to remove protein, and desalted on a column of Sephadex G 10(5×10 cm). ³¹P NMR analysis of the reaction mixture detected formationof FL3P.

Based on the proof of kinase activity thus obtained, a radioactive assaywas developed. This assay was designed to take advantage of the bindingto Dow-50 cation exchange resin by FL3P. This characteristic of FL3P wasdiscovered during efforts to isolate it. Since most phosphates do notbind to this resin, it was suspected that the bulk of all compounds thatreact with ATP as well as any excess ATP would not be bound. The firststep was to determine the amount of resin required to remove the ATP inthe assay. This was accomplished by pipetting the mixture into asuspension of 200 mg of Dow-1 in 0.9 ml H₂O, vortexing, and centrifugingto pack the resin. From this 0.8 ml of supernatant was pipetted onto 200mg of fresh dry resin, vortexed and centrifuged. A 0.5 ml volume ofsupernatant was pipetted into 10 ml of Ecoscint A and counted. Residualcounts were 85 cpm. This procedure was used for the assay. Theprecipitate from 60% ammonium sulfate precipitation of the crude cortexhomogenate was redissolved in the homogenate buffer at 4° C. The assaycontains 10 mM γ³³P-ATP (40,000 cpm), 10 mM FL, 150 mM KCl, 15 mM MgCl₂,5 mM DTT in 0.1 ml of 50 mM Tris.HCl, pH 7.5. The relationship betweenrates of FL3P production and enzyme concentration was determined usingtriplicate determinations with 1, 2, and 4 mg of protein for 30 minutesat 37° C. Blanks run concurrently without FL were subtracted and thedata recorded. The observed activity corresponds to an approximate FL3Psynthesis rate of 20 nmols/hr/mg protein.

Example 4 Inhibition of the Formation of 3-Deoxyglucosone by Meglumineand Various Polyollysines

a. General Polyollysine Synthesis:

The sugar (11 mmoles), α-carbobenzoxy-lysine (10 mmols) and NaBH₃CN (15mmoles) were dissolved in 50 ml of MeOH—H₂O (3:2) and stirred at 25° C.for 18 hours. The solution was treated with an excess of Dow-50 (H) ionexchange resin to decompose excess NaBH₃CN. This mixture (liquid plusresin) was transferred onto a Dow-50 (H) column (2.5×15 cm) and washedwell with water to remove excess sugar and boric acid. Thecarbobenzoxy-polyollysine was eluted with 5% NH₄OH. The residue obtainedupon evaporation was dissolved in water-methanol (9:1) and reduced withhydrogen gas (20 psi) using a 10% palladium on charcoal catalyst.Filtration and evaporation yields the polyollysine.

b. Experimental Protocol for Reduction of Urinary and Plasma3-Deoxyglucosone by Sorbitollysine, Mannitollysine and Galactitollysine:

Urine was collected from six rats for three hours. A plasma sample wasalso obtained. The animals were then given 10 μmols of eithersorbitollysine, mannitollysine, or galactitollysine by intraperitonealinjection. Urine was collected for another three hours, and a plasmasample obtained at the end of the three hours.

a. 3-deoxyglucosone was measured in the samples, as described in Example5, below, and variable volumes were normalized to creatinine. Theaverage reduction of urinary 3-deoxyglucosone was 50% by sorbitollysine,35% by mannitollysine and 35% by galactitollysine. Plasma3-deoxyglucosone was reduced 40% by sorbitollysine, 58% bymannitollysine and 50% by galactitollysine.

b. Use of meglumine to reduce urinary 3-deoxyglucosone:

Three rats were treated as in b), immediately above, except meglumine(100 μmols) was injected intraperitoneally instead of theabove-mentioned lysine derivatives. Three hours after the injection theaverage 3-deoxyglucosone concentrations in the urine were decreased 42%.

Example 5 Elevation of Urinary FL, 3DG and 3DF in Humans FollowingIngestion of Glycated Protein

a. Preparation of Glycated Protein Containing Food Product:

260 g of casein, 120 g of glucose and 720 ml of water were mixed to givea homogeneous mixture. This mixture was transferred to a metal plate andheated at 65° C. for 68 hours. The resulting cake was then pulverized toa coarse powder.

This powder contained 60% protein as determined by the Kjeldahlprocedure.

b. Measurement of Glycated Lysine Content:

One gram of the powder prepared as in step a., above, was hydrolyzed byrefluxing with 6N HCl for 20 hours. The resulting solution was adjustedto pH 1.8 with NaOH solution and diluted to 100 ml. The fructoselysinecontent was measured on an amino acid analyzer as furosine, the productobtained from acid hydrolysis of fructoselysine. In this way, it wasdetermined that the cake contained 5.5% (w/w) fructoselysine.

c. Experimental Protocol:

Volunteers spent two days on a fructoselysine-free diet and thenconsumed 22.5 g of the food product prepared as described herein, thuseffectively receiving a 2 gram dose of fructoselysine. Urine wascollected at 2 hour intervals for 14 hours and a final collection wasmade at 24 hours.

d. Measurement of FL, 3DG and 3DF in Urine:

FL was measured by HPLC with a Waters 996 diode Array using a Waters C18Free Amino Acid column at 46° C. and a gradient elution system ofacetonitrile-methyl alcohol-water (45:15:40) into acetonitrile-sodiumacetate-water (6:2:92) at 1 ml/min. Quantitation employed an internalstandard of meglumine.

3DF was measured by HPLC after deionization of the sample. Analyses wereperformed on a Dionex DX-500 HPLC system employing a PA1 column (Dionex)and eluting with 32 mM sodium hydroxide at 1 ml/min. Quantitation wasperformed from standard curves obtained daily with synthetic 3DF.

3DG was measured by GC-MS after deionization of the sample. 3DG wasderivatized with a 10-fold excess of diaminonaphthalene in PBS. Ethylacetate extraction gave a salt free fraction which was converted to thetrimethyl silyl ethers with Tri-Sil (Pierce). Analysis was performed ona Hewlett-Packard 5890 selected ion monitoring GC-MS system. GC wasperformed on a fused silica capillary column (DB-5, 25 mx·25 mm) usingthe following temperature program: injector port 250° C., initial columntemperature 150° C. which is held for 1 minute, then increased to 290°C. at 16° C./minute and held for 15 minutes. Quantitation of 3DGemployed selected ion monitoring using an internal standard ofU-13C-3DG.

The results of the experiments described in this example are nowpresented.

The graph depicted in FIG. 3 represents production of FL, 3DF, and 3DGin the urine of one volunteer after consuming the glycated protein. Therapid appearance of all three metabolites is clearly evident. Both 3DFand 3DG show a slight elevation even after twenty-four hours.

The graph shown in FIG. 4 represents the formation of 3DF in each of themembers of a seven-person test group. A similar pattern was seen in allcases. As demonstrated in FIG. 4, 3DF excretion peaks about 4 hoursafter the FL bolus and a slight elevation of 3DF is noticeable even 24 hafter the bolus.

Example 6 Effects of Increased Dietary Uptake of Glycated Proteins

N-acetyl-β-glucosaminidase (NAGase) is an enzyme excreted into the urinein elevated concentration in diabetics. It is thought to be an earlymarker of tubular damage, but the pathogenesis of increased NAGase inurine is not well understood. The increased urinary output of NAGase indiabetics has been proposed to be due to activation of lysosomes inproximal tubules induced by diabetes with an increased output into theurine rather than destruction of cells.

Rats were fed a diet containing 0.3% glycated protein or control feedover several months. The urinary output of NAGase and 3DF weredetermined at various times, as indicated in FIG. 5. The amount of 3DGexcreted in urine was also determined.

The results obtained in this example demonstrate that in all comparisons3DF and NAGase levels are elevated in the experimental group relative tothe control. Thus, animals fed glycated protein excrete excess NAGaseinto their urine, similar to results obtained with diabetics. NAGaseoutput increased by approximately 50% in the experimental group,compared with control animals. The experimental animals also had afive-fold increase in urine 3DF compared with controls. Urinary 3DF wasfound to correlate extremely well with 3DG, as can be seen in FIGS. 5and 6.

Example 7 Electrophoretic Analysis of Kidney Proteins

Two rats were injected daily with 5 μmols of either FL or mannitol (usedas a control) for 5 days. The animals were sacrificed and the kidneysremoved and dissected into the cortex and medulla. Tissues werehomogenized in 5 volumes of 50 mM Tris.HCl containing 150 mM KCl, 15 mMMgCl₂ and 5 mM DTT, pH 7.5. Cellular debris was removed bycentrifugation at 10,000×g for 15 minutes, and the supernatant was thencentrifuged at 150,000×g for 70 minutes. The soluble proteins wereanalyzed by SDS PAGE on 12% polyacrylamide gels as well as on 4-15 and10-20% gradient gels.

It was found that in all cases, lower molecular weight bands weremissing or visually reduced from the kidney extract of the animalinjected with FL when compared with the animal injected with mannitol.

Example 8 Synthesis of 3-O-methylsorbitollysine Structure XIX

3-OMe glucose (25 grams, 129 mmol) and α-Cbz-lysine (12 grams, 43 mmol)were dissolved in 200 ml of water-methanol (2:1). Sodiumcyanoborohydride (10 grams, 162 mmol) was added and the reaction stirredfor 18 days at room temperature. Reaction of α-Cbz-lysine was monitoredby thin layer chromatography on silica gel employing 1-butanol-aceticacid-water (4:1:1) using ninhydrin for visualization. The reaction wascomplete when no α-Cbz-lysine remained. The solution was adjusted to pH2 with HCl to decompose excess cyanoborohydride, neutralized and thenapplied to a column (5×50 cm) of Dowex-50 (H+) and the column washedwell with water to remove excess 3-O-me-glucose. The target compound waseluted with 5% ammonium hydroxide. After evaporation the residue wasdissolved in 50 ml of water-methanol (2:1) and 10% Pd/C (0.5 gram) wasadded. The mixture was shaken under 20 psi of hydrogen for 1 hr. Thecharcoal was filtered off and the filtrate evaporated to a white powder(10.7 gram, 77% yield based on α-Cbz-lysine) that was homogeneous whenanalyzed by reversed phase HPLC as the phenylisothiocyanate derivative.Elemental analysis: Calculated for C₁₃H₂₈N₂O₇.CH₃OH.2H₂OC, 42.86; H,9.18; N, 7.14. Found: C, 42.94; H, 8.50; N, 6.95.

Other specific compounds having the structure of formula (XIX), above,may be made, e.g., by glycation of a selected nitrogen- oroxygen-containing starting material, which may be an amino acid,polyaminoacid, peptide or the like, with a glycating agent, such asfructose, which may be chemically modified, if desired, according toprocedures well know to those skilled in the art.

Example 9 Additional Assay for FL3P Kinase Activity

a. Preparation of Stock Solutions:

An assay buffer solution was prepared which was 100 mM HEPES pH 8.0, 10mM ATP, 2 mM MgCl₂, 5 mM DTT, 0.5 mM PMSF. A fructosyl-spermine stocksolution was prepared which was 2 mM fructosyl-spermine HCl. A sperminecontrol solution was prepared which was 2 mM spermine HCl.

b. Synthesis of Fructosyl-Spermine:

Synthesis of fructosyl-spermine was performed by an adaptation of aknown procedure (J. Hodge and B. Fisher, 1963, Methods Carbohydr. Chem.,2:99-107). A mixture of spermine (500 mg), glucose (500 mg), and sodiumpyrosulfite (80 mg) was prepared in a molar ratio of 8:4:1(spermine:glucose:pyrosulfite) in 50 ml of methanol-water (1:1) andrefluxed for 12 hours. The product was diluted to 200 ml with water andloaded onto a DOW-50 column (5×90 cm). The unreacted glucose was removedby 2 column volumes of water and the product and unreacted spermine wereremoved with 0.1 M NH₄OH. Pooled peak fractions of the product werelyophilized and concentration of fructosyl-spermine was determined bymeasuring the integral of the C-2 fructosyl peak in a quantitative ¹³CNMR spectrum of the product (NMR data collected with a 45° pulse, a 10second relaxation delay and without NOE decoupling).

c. Kinase Assay to Determine Purification:

An incubation mixture was prepared including 10 μl of the enzymepreparation, 10 μl of assay buffer, 1.0 μCi of ³³P ATP, 101 offructosyl-spermine stock solution and 70 μl of water and incubated at37° C. for 1 hour. At the end of the incubation 90 μl (2×45 μl) of thesample was spotted onto two 2.5 cm diameter cellulose phosphate disks(Whatman P-81) and allowed to dry. The disks were washed extensivelywith water. After drying, the disks were placed in scintillation vialsand counted.

Each enzyme fraction was assayed in duplicate with an appropriatespermine control.

Example 10 Kidney Pathology Observed in Test Animals on Glycated ProteinDiet

Three rats were maintained on a glycated protein diet (20% totalprotein; 3% glycated) for 8 months and compared to 9 rats of the sameage maintained on a control diet. The glycated protein diet consisted ofa standard nutritious diet to which 3% glycated protein had beensubstituted for nonglycated protein. The glycated protein was made bymixing together casein and glucose (2:1), adding water (2× the weight ofthe dried material), and baking the mixture at 60° C. for 72 hours. Thecontrol was prepared in the same way except that no water was used andthe casein and glucose were not mixed prior to baking.

The primary finding was a substantial increase in damaged glomeruli inthe animals on the glycated diet. Typical lesions observed in theseanimals were segmental sclerosis of the glomerular tuft with adhesion toBowman's capsule, tubular metaplasia of the parietal epithelium andinterstitial fibrosis. All animals on the glycated protein diet, andonly one of the animals on the control diet showed more than 13% damagedglomeruli. The probability of this happening by chance is less than 2%.In addition to the pathological changes observed in the glomeruli, anumber of hyalinated casts within tubules were observed. More of thesehyalinated casts were found in animals on the glycated diet, althoughthese were not quantitated. Increased levels of NAGase were alsoobserved in the animals on the glycated diet.

Based on the results of this experiment, the glycated diet appeared tocause the test animals to develop a series of histological lesionssimilar to those seen in the diabetic kidney.

Example 12 Carcinogenic Effects of Fructoselysine Pathway

To investigate the carcinogenic potential of metabolites formed in thefructoselysine pathway, experiments were conducted on a strain of ratswith a high susceptibility to kidney carcinomas.

Four rats were put on a glycated protein diet and three rats on acontrol diet. After ten weeks on the diet, the animals were sacrificedand their kidneys examined.

In all four animals on the diet, kidney carcinomas of size greater than1 mm were found, whereas no lesions this large were found in the controlanimals. The probability of this happening by chance is less than 2%.

The data demonstrate that there are elevated 3DG levels, caused by theexcess fructoselysine coming from the glycated protein in the diet, inthe kidney tubular cells (known to be the cell of origin of most kidneycarcinomas), and the 3DG can interact with the cellular DNA, leading toa variety of mutagenic and ultimately carcinogenic events. Thepossibility exists that this process is important in the development ofhuman cancers in the kidney and elsewhere.

Example 13 Dietary Effects of Glycated Protein Diet on Renal CellCarcinoma in Susceptible Rats

In addition to the experiments described above, experiments wereperformed to assess the relationship between a glycated protein diet andrenal cell carcinoma.

Twenty-eight rats with a mutation making them susceptible to thedevelopment of kidney carcinoma were divided into two cohorts. Onecohort was fed a glycated protein diet and the other cohort was on acontrol diet. The glycated protein diet consisted of a standardnutritious diet to which 3% glycated protein had been added. Theglycated protein was made by mixing together casein and glucose (2:1),adding water (2× the weight of the dried material), and baking themixture at 60° C. for 72 hours. The control was prepared in the same wayexcept that no water was used and the casein and glucose were not mixedprior to baking. Rats were placed on the diets immediately followingweaning at three weeks of age and maintained on the diets ad libitum forthe next 16 weeks. The animals were then sacrificed, the kidneys fixed,and hematoxylin and eosin sections were prepared.

The histological samples were examined by a pathologist. Four types oflesions were identified. These include: cysts; very small collections oftumor-like cells, typically less than 10 cells; small tumors, 0.5 mm orless; and tumors greater than 0.5 mm. For the four types of lesions,more lesions were observed in the animals on the glycated diet than onthe control diet, as shown in the following table (Table A).

TABLE A CYSTS ≦10 CELLS ≦0.5 mm >0.5 mm TOTAL CONTROL 2 9 9 3 23GLYCATED 9 21 32 6 68

To summarize the results, the average number of lesions per kidneysection was computed for each diet. These were 0.82±0.74 and 2.43±2.33in the control and glycated diet, respectively. The likelihood of thishappening by chance is about 2 in 100,000.

These results provide strong support for the premise that the effects ofthe lysine recovery pathway, the discovery of which underlies thepresent invention, extend to causing mutations, and thus produce acarcinogenic effect as well. These results provide a basis for thedevelopment of therapeutic methods and agents to inhibit this pathway inorder to reduce cancer in the kidney as well as in other organs wherethis pathway may have similar effects.

Example 14 Urinary Excretion of 3-Deoxy-fructose is Indicative ofProgression to Microalbuminuria in Patients with Type I Diabetes

As set forth herein, serum levels of the glycation intermediate, threedeoxy-glucosone (3DG) and its reductive detoxification product, threedeoxy-fructose (3DF), are elevated in diabetes. The relationship betweenbaseline levels of these compounds and subsequent progression ofmicroalbuminuria (MA) has been examined in a group of 39 individualsfrom a prospective cohort of patients at the Joslin Diabetes Center withinsulin-dependent diabetes mellitus (IDDM) and microalbuminuria (basedon multiple measurements during the two years of baseline startingbetween 1990-1993) and not on ACE inhibitors.

Baseline levels of 3DF and 3DG in random spot urines were measured byHPLC and GC-MS. Individuals that progressed to either a higher level ofMA or proteinuria in the next four years (n=24) had significantly higherbaseline levels of log 3DF/urinary creatinine ratios compared tonon-progressors (n=15) (p=0.02).

Baseline levels determined in this study were approximately 0.24μmole/mg of creatinine in the progressors vs. approximately 0.18μmole/mg of creatinine ratios in the non-progressors. Baseline 3DG/urinecreatinine ratios did not differ between the groups. Adjustment of thebaseline level of HgA_(Ic) (the major fraction of glycosylatedhemoglobin) did not substantially alter these findings. These resultsprovide additional evidence of the association between urinary 3DF andprogression of kidney complications on diabetes.

a. Quantification of 3-deoxyfructose:

Samples were processed by passing a 0.3 ml aliquot of the test samplethrough an ion-exchange column containing 0.15 ml of AG 1-X8 and 0.15 mlof AG 50W-X8 resins. The columns were then washed twice with 0.3 mldeionized water, aspirated to remove free liquid and filtered through a0.45 mm Millipore filter.

Injections (50 μl) of the treated samples were analyzed using a DionexDX 500 chromatography system. A carbopac PA1 anion-exchange column wasemployed with an eluant consisting of 16% sodium hydroxide (200 mM) and84% deionized water. 3DF was detected electrochemically using a pulsedamperometric detector. Standard 3DF solutions spanning the anticipated3DF concentrations were run both before and after each unknown sample.

b. Measurement of Urine Creatinine:

Urine creatinine concentrations were determined by the end-pointcalorimetric method (Sigma Diagnostic kit 555-A) modified for use with aplate reader. Creatinine concentrations were assessed to normalize urinevolumes for measuring metabolite levels present therein.

c. Measurement of Albumin in the Urine:

To assess albumin levels in the urine of the test subjects, spot urineswere collected and immunoephelometry performed on a BN 100 apparatuswith the N-albumin kit (Behring). Anti-albumin antibodies arecommercially available. Albumin levels in urine may be assessed by anysuitable assay including but not limited to ELISA assays,radioimmunoassays, Western, and dot blotting.

Based on the data obtained in the study of the Joslin Diabetes Centerpatients, it appears that elevated levels of urinary 3DF are associatedwith progression to microalbuminuria in diabetes. This observationprovides a new diagnostic parameter for assessing the likelihood ofprogression to serious kidney complications in patients afflicted withdiabetes.

Example 15 3-O-methyl Sorbitollysine Lowers Systemic Levels of 3DG inNormal and Diabetic Rats

A cohort of twelve diabetic rats was divided into two groups of six. Thefirst group received saline-only injections, and the second receivedinjections of 3-O-methyl sorbitollysine (50 mg/kg body weight) in salinesolution. The same procedure was conducted on a cohort of twelvenon-diabetic rats.

As summarized in Table B, within one week, the 3-O-methyl sorbitollysinetreatment significantly reduced plasma 3DG levels as compared to therespective saline controls in both diabetic and non-diabetic rats.

TABLE B 3-O-Methyl sorbitollysine (3-OMe) reduces plasma 3DG levels indiabetic and non-diabetic rats. Non-diabetic Diabetic rats rats Salineonly 0.94 ± 0.28 uM 0.23 ± 0.07 uM (n = 6) (n = 6) 3-OMe 0.44 ± 0.10 uM0.13 ± 0.02 uM (n = 6) (n = 7) % Reduction 53% 43% t-test p = 0.0006 p =0.0024

The ability of 3-O-methyl sorbitollysine to reduce systemic 3DG levelssuggests that diabetic complications other than nephropathy (e.g.,retinopathy and stiffening of the aorta) may also be controllable byamadorase inhibitor therapy.

Example 16 Locus of 3-O-methyl Sorbitollysine Uptake In Vivo is theKidney

Six rats were injected intraperitoneally with 13.5 nmoles (4.4 mg) of3-O-methyl sorbitollysine. Urine was collected for 3 hours, after whichthe rats were sacrificed. The tissues to be analyzed were removed andfreeze clamped in liquid nitrogen. Perchloric acid extracts of thetissues were used for metabolite analysis. The tissues examined weretaken from the brain, heart, muscle, sciatic nerve, spleen, pancreas,liver, and kidney. Plasma was also analyzed.

The only tissue extract found to contain 3-O-methyl sorbitollysine wasthat of the kidney. The urine also contained 3-O-methyl sorbitollysine,but plasma did not. The percentage of the injected dose recovered fromurine and kidney varied between 39 and 96%, as shown in Table C, below.

TABLE C nmols Nmols nmols total % 3OMeSL* 3OMeSL 3OMeSL 3OMeSL 3OMeSLRat # Injected in urine in kidneys recovered recovered 2084 13500 294010071 13011 96.4 2085 13500 1675 6582 8257 61.2 2086 13500 1778 53737151 53.0 2087 13500 2360 4833 7193 53.3 2088 13500 4200 8155 12355 91.52089 13500 1355 3880 5235 38.8 *3-O-methyl sorbitollysine

Example 17 Amadorase/Fructosamine Kinase Activity Accounts for aMajority of 3DG Production

Enzymatic production of 3DG was demonstrated in an in vitro assay withvarious key components (10 mM Mg-ATP, partially purified amadorase, 2.6mM FL) omitted from the reaction in order to assess their importance in3DG production.

The results show that 3DG production is 20-fold higher in the presenceof kidney extract containing amadorase and its substrates (compare TableD, reactions 1 and 3). Clearly, the vast majority of 3DG production isenzymatically mediated in the presence of amadorase.

TABLE D Amadorase-dependent production of 3DG after 24 hours FL FL3P 3DGReaction Amadorase ATP (mM) (mM) (mM) 1 + + 2.6 0.2 1.58 2 + − 2.6 00.08 3 − + 2.6 0 0.09 4 − − 2.6 0 0.08 5 + + 0 0 0 6 − + 0 0 0

Example 18 Effects of 3DG, and Inhibition of 3DG, on CollagenCrosslinking

Collagen is present at high levels in skin. To this end, it wasdetermined what effect 3DG has on collagen crosslinking.

Collagen I was incubated in the presence or absence of 3DG in vitro.Calf skin collagen Type I (1.3 mg; Sigma) was incubated in 20 mMNa-phosphate buffer, pH 7.25, either alone, with 5 mM 3DG, or with 5 mM3DG plus 10 mM arginine, in a total volume of 1 ml at 37° C. for 24hours and then frozen and lyophilized. The residue was dissolved in 0.5ml of 70% formic acid and cyanogen bromide was added (20:1, w/w). Thissolution was incubated at 30° C. for 18 hours. Samples were dialyzedagainst 0.125 M Tris, pH 6.8, containing 2% SDS and 2% glycerol, indialysis tubing with a molecular weight cutoff of 10,000. The sampleswere all adjusted to a volume of 1 ml. The extent of collagencrosslinking was determined by applying equal volumes of sample andanalyzing by SDS-PAGE electrophoresis (16.5% Tris-tricine gel), asdetermined by the effects of 3DG on the migration of collagen.

It was found that treatment of collagen with 3DG caused the collagen tomigrate as if it had a higher molecular weight, which is indicative ofcrosslinking. The image of the silver-stained gel in FIG. 12demonstrates that there are fewer high molecular bands in the groupscontaining collagen alone or collagen plus 3DG plus arginine. There aremore high molecular weight bands in the group treated with 3DG, in theabsence of a 3DG inhibitor. There appears to be more protein in thesample treated with 3DG alone. Because all three samples started withthe same mount of protein, without being bound by theory, it can beconcluded that during dialysis fewer peptides escaped from the 3DGtreated sample because more crosslinks were produced and highermolecular weight proteins were retained. In other words, there appearsto be less protein in the control and 3DG plus arginine groups, becausesmaller molecular peptides diffused out during dialysis.

Example 19 Localization of 3DG in Skin

The invention as described in the present disclosure identifies for thefirst time the presence of 3DG in skin.

A mouse skin model was used. One centimeter (1 cm) squares of skin wereprepared and subjected to extraction with perchloric acid. 3DG wasmeasured as described above. Six mice were used and the average amountof 3DG detected in the skin was 1.46+/−0.3 μM. This value wassubstantially higher than the plasma concentrations of 3DG detected inthe same animals (0.19+/−0.05 μM). These data, and the data describedbelow in Example 20, suggest that the high levels of 3DG in the skin aredue to production of 3DG in the skin.

Example 20 Localization of Amadorase mRNA in Skin

Although high levels of 3DG were found in skin (see previous Example),it was not known whether the 3DG was formed locally and whether skin hadthe ability to produce 3DG enzymatically. The presence of amadorase mRNAwas analyzed and was utilized as one measure of the ability of skin toproduce the 3DG present in skin (see previous example).

PolyA+ messenger RNA isolated from human kidney and skin was purchasedfrom Stratagene. The mRNA was used in RT-PCR procedures. Using thepublished sequence for amadorase (Delpierre et al., 2000, Diabetes49:10:1627-1634; Szwergold et al., 2001, Diabetes 50:2139-2147), areverse primer to the 3′ terminal end of the gene (bp 930-912) wassubjected to RT to create a cDNA template for PCR. This same primer wasused along with a forward primer from the middle of the amadorase gene(bp 412-431) to amplify the amadorase gene from the cDNA template. Theproduct of the PCR should be a 519 bp fragment. Human skin and kidneysamples were subjected to RT-PCR and analyzed by agarose gelelectrophoresis, as were controls which contained no cDNA templates.

The results demonstrate that skin does indeed express amadorase mRNA.Subsequent expression of the protein would account for production of 3DGin skin. As expected, a 519 bp product was observed (see FIG. 13). Notonly was the 519 bp fragment found in kidney (lane 1), it was also foundin skin (lane 3). The 519 bp fragment was not detected in the groupswhich received no cDNA template (lanes 2 and 4).

Example 21 Effects of Fructoselysine on Kidney Cells In Vitro

As described above, a diet high in glycated proteins, e.g.,fructoselysine, has a profound effect on metabolism in vivo. Therefore,the effects of fructoselysine were tested directly on kidney cells invitro.

The results demonstrate that fructoselysine administered to kidney cellsin vitro causes an increase in type IV collagen levels in the cells.Type IV collagen production was measured in mouse mesangial cells.Controls (grown with 10% glucose) produced 300 ng of Type IV collagenper 10,000 cells, whereas fructoselysine treated cells (5 or 10 mMfructoselysine with 10 mM glucose) produced 560 and 1100 ng/10,000cells.

Example 22 Inhibition of 3DG by Inhibiting Amadorase mRNA and Protein

3DG synthesis may be inhibited by inhibiting the components of theenzymatic pathway leading to its synthesis. This can be done in severalways. For example, the enzyme which leads to the synthesis of 3DG,called amadorase herein (a fructosamine-3-kinase) can be inhibited fromacting using a compound as described above, but it can also be inhibitedby blocking the synthesis of its message or protein or by blocking theprotein itself, other than with a compound, as described above.

Amadorase mRNA and protein synthesis and function may be inhibited usingcompounds or molecules such as transcription or translation inhibitors,antibodies, antisense messages or oligonucleotides, or competitiveinhibitors.

Nucleic Acid and Protein Sequences

The following represents the 988 bp mRNA-derived DNA sequence foramadorase (fructosamine-3-kinase), Accession No. NM_(—)022158 (SEQ IDNO:1) (see FIG. 10):

  1 cgtcaagctt ggcacgaggc catggagcag ctgctgcgcg ccgagctgcg caccgcgacc 61 ctgcgggcct tcggcggccc cggcgccggc tgcatcagcg agggccgagc ctacgacacg121 gacgcaggcc cagtgttcgt caaagtcaac cgcaggacgc aggcccggca gatgtttgag181 ggggaggtgg ccagcctgga ggccctccgg agcacgggcc tggtgcgggt gccgaggccc241 atgaaggtca tcgacctgcc gggaggtggg gccgcctttg tgatggagca tttgaagatg301 aagagcttga gcagtcaagc atcaaaactt ggagagcaga tggcagattt gcatctttac361 aaccagaagc tcagggagaa gttgaaggag gaggagaaca cagtgggccg aagaggtgag421 ggtgctgagc ctcagtatgt ggacaagttc ggcttccaca cggtgacgtg ctgcggcttc481 atcccgcagg tgaatgagtg gcaggatgac tggccgacct ttttcgcccg gcaccggctc541 caggcgcagc tggacctcat tgagaaggac tatgctgacc gagaggcacg agaactctgg601 tcccggctac aggtgaagat cccggatctg ttttgtggcc tagagattgt ccccgcgttg661 ctccacgggg atctctggtc gggaaacgtg gctgaggacg acgtggggcc cattatttac721 gacccggctt ccttctatgg ccattccgag tttgaactgg caatcgcctt gatgtttggg781 gggttcccca gatccttctt caccgcctac caccggaaga tccccaaggc tccgggcttc841 gaccagcggc tgctgctcta ccagctgttt aactacctga accactggaa ccacttcggg901 cgggagtaca ggagcccttc cttgggcacc atgcgaaggc tgctcaagta gcggcccctg961 ccctcccttc ccctgtcccc gtccccgt

The following represents the 309 amino acid residue sequence of humanamadorase (fructosamine-3-kinase), Accession No. NP_(—)071441 (SEQ IDNO:2) (see FIG. 11):

  1 meqllraelr tatlrafggp gagcisegra ydtdagpvfv kvnrrtqarq mfegevasle 61 alrstglvrv prpmkvidlp gggaafvmeh lkmkslssqa sklgeqmadl hlynqklrek121 lkeeentvgr rgegaepqyv dkfgfhtvtc cgfipqvnew qddwptffar hriqaqldli181 ekdyadrear elwsrlqvki pdlfcgleiv pallhgdlws gnvaeddvgp iiydpasfyg241 hsefelaial mfggfprsff tayhrkipka pgfdqrllly qlfnylnhwn hfgreyrsps301 lgtmrrllk

The sequences identified above were submitted by Delpierre et al. (2000,Diabetes 49:16227-1634). The sequence data of Szwergold et al. (2001,Diabetes 50:2139-2147) are in excellent agreement with those ofDelpierre et al. For example, the protein sequence deduced by Szwergoldet al. (2001, Diabetes 50:2139-2147) is identical with the cloned humanfructosamine-3-kinase sequence of Delpierre et al. (2000, Diabetes49:16227-1634) in 307 of 309 amino acid residues. Thus, reliance on thepublished sequences of either group should not be a problem, however, toensure that no problems arise when a sequence of the protein is to beused, only those portions of the sequence which are not differentbetween the two published sequences will be used.

Example 23 Presence of Alpha-Dicarbonyl Sugars in Sweat

As disclosed herein, alpha-dicarbonyl sugars are present in skin, buttheir presence in sweat had not been determined. One of the functions ofskin is to act as an excretory organ, therefore, it was determinedwhether alpha-dicarbonyl sugars are excreted in sweat.

Samples of human sweat were analyzed for the presence of 3DG, asdescribed above. Samples from four subjects were obtained and 3DG wasdetermined to be present at levels of 0.189, 2.8, 0.312, and 0.11 μM,respectively. Therefore, the results demonstrate the presence of 3DG insweat.

Example 24 Effects of DYN 12 (3-O-methylsorbitollysine) on SkinElasticity

Administration of DYN 12, a small molecule inhibitor of amadorase,reduces 3DG levels in the plasma of diabetic and non-diabetic animals(Kappler et al., 2002, Diabetes Technol. Ther., Winter 3:4:606-609).

Experiments were performed to determine the effects of DYN 12 on theloss of skin elasticity associated with diabetes. To this end, twogroups of STZ-diabetic rats and two groups of normal rats were subjectedto treatment with DYN 12 or saline. One group of STZ-diabetic rats (n=9)received daily subcutaneous injections of DYN 12 at 50 mg/kg for eightweeks, as did one group of normal rats (n=6). A group of controldiabetic rats (n=10) and a group of normal rats (n=6) received salineinstead of DYN 12. One rat was removed from the diabetic DYN 12 groupafter 2 weeks because its blood glucose readings were inconsistent (toolow) with other diabetic rats.

A non-invasive procedure based on CyberDERM, Inc. technology utilizing askin elasticity measurement device was used to test the effects of DYN12 treatment on skin elasticity. The procedure provides for non-invasivemeasurement of skin elasticity based upon the amount of vacuum pullrequired to displace skin. A suction cup probe is adhered to an area ofshaved skin in order to form an airtight seal. Then, a vacuum is appliedto the area of the skin inside the suction cup until the skin isdisplaced past a sensor located inside the probe. Accordingly, the morepressure that is required to displace the skin, the less elastic theskin is.

The data demonstrate that after eight weeks of treatment skin elasticityin diabetic rats treated with DYN 12 was greater than skin elasticity indiabetic animals which were treated with saline. As seen in FIG. 14, theamount of pressure needed to displace the skin of diabetic rats treatedwith saline (7.2+/−3.0 kPA) was approximately 2 to 2.25 fold higher thanthe pressure needed to displace the skin of diabetic animals treatedwith DYN 12 (3.2+/−1.2 kPA). Also, the elasticity value observed indiabetic rats treated with DYN 12 was not statistically different fromthe value found in non-diabetic rats treated with saline (p=0.39) (TableE). Thus, the result of treatment of diabetic animals with DYN 12, anindirect inhibitor of 3DG, was skin with greater elasticity than skin indiabetic animals which received only saline.

TABLE E Statistical Analysis and Comparison of Cohort Groups. Group 1Group 2 p value Diabetic saline Non-diabetic saline p = 0.01 Diabeticsaline Diabetic DYN 12 p = 0.001 Diabetic saline Non-diabetic DYN 12 p =0.003 Diabetic DYN 12 Non-diabetic DYN 12 p = 0.39 Diabetic DYN 12Non-diabetic saline p = 0.26 Non-diabetic saline Non-diabetic DYN 12 p =0.20

The disclosures of each and every patent, patent application, andpublication cited herein are hereby incorporated herein by reference intheir entirety.

While this invention has been disclosed with reference to specificembodiments, it is apparent that other embodiments and variations ofthis invention may be devised by others skilled in the art withoutdeparting from the true spirit and scope of the invention. The appendedclaims are intended to be construed to include all such embodiments andequivalent variations.

1. A method of inhibiting skin wrinkling in the skin of a mammal, said method comprising administering to a mammal in need thereof an effective amount of meglumine or a salt thereof to inhibit synthesis of 3DG in said skin, further wherein said meglumine or salt thereof is administered via a topical route in a pharmaceutical composition, selected from the group consisting of a lotion, a cream, a gel, a liniment, an ointment, a paste, a solution, a powder, and a suspension.
 2. The method of claim 1, wherein said mammal is a human.
 3. The method of claim 1, wherein said composition further comprises a moisturizer, a humectant, a demulcent, oil, water, an emulsifier, a thickener, a thinner, a surface active agent, a fragrance, a preservative, an antioxidant, a hydrotropic agent, a chelating agent, a vitamin, a mineral, a permeation enhancer, a cosmetic adjuvant, a bleaching agent, a depigmentation agent, a foaming agent, a conditioner, a viscosifier, a buffering agent, and a sunscreen.
 4. The method of claim 1, wherein said meglumine or a salt thereof is administered at a frequency selected from the group consisting of once a day, twice a day, three times a day, four times a day, once a week, twice a week, once a month, and twice a month.
 5. The method of claim 1, wherein said meglumine or a salt thereof is administered at a dosage ranging from about 1 ng/kg/application to about 100 g/kg/application.
 6. The method of claim 1, wherein said meglumine or a salt thereof is administered at a dosage ranging from about 1 ng/kg/application to about 100 mg/kg/application.
 7. The method of claim 1, wherein said meglumine or a salt thereof is administered as a controlled-release formulation.
 8. The method of claim 1, wherein said meglumine or a salt thereof comprises from about 0.0001% to about 15% by weight of the composition.
 9. A method of treating skin wrinkling in a mammal in need thereof, said method comprising, administering to said mammal an effective amount of meglumine or a salt thereof which inhibits at least one of the members of the group consisting of the production of said 3DG, the accumulation of said 3DG and the function of said 3DG in skin, further wherein said meglumine or a salt thereof is administered via a topical route in a pharmaceutical composition selected from the group consisting of a lotion, a cream, a gel, a liniment, an ointment, a paste, a solution, a powder, and a suspension.
 10. The method of claim 9, wherein said mammal is a human.
 11. The method of claim 9, wherein said composition further comprises a moisturizer, a humectant, a demulcent, oil, water, an emulsifier, a thickener, a thinner, a surface active agent, a fragrance, a preservative, an antioxidant, a hydrotropic agent, a chelating agent, a vitamin, a mineral, a permeation enhancer, a cosmetic adjuvant, a bleaching agent, a depigmentation agent, a foaming agent, a conditioner, a viscosifier, a buffering agent, and a sunscreen.
 12. The method of claim 9, wherein said meglumine or a salt thereof is administered at a frequency selected from the group consisting of once a day, twice a day, three times a day, four times a day, once a week, twice a week, once a month, and twice a month.
 13. The method of claim 9, wherein said inhibitor is administered at a dosage ranging from about 1 ng/kg/application to about 100 g/kg/application.
 14. The method of claim 9, wherein said inhibitor is administered at a dosage ranging from about 1 ng/kg/application to about 100 mg/kg/application.
 15. The method of claim 9, wherein said inhibitor is administered as a controlled-release formulation.
 16. The method of claim 15, wherein said inhibitor comprises from about 0.0001% to about 15% by weight of said formulation. 